The truth of Wu Da’s "cherry blossom viewing conflict" has not been fully disclosed.

  CCTV News:Now is the season of spring. Cherry Blossom Avenue of Wuhan University attracts many tourists every year, which also brings a lot of management pressure to the school. Since 2016, Wuhan University has begun to use online booking to limit the flow of people. For this few percent of flower viewing opportunities, people have made great efforts and even clashed. For example, Wuhan University was recently involved in the whirlpool of public opinion. Two tourists who came to Wuhan University to enjoy cherry blossoms had a physical conflict with the security guard. Some people said that they had a conflict with the security guard when they were prevented from entering the campus because they wore kimonos. So what is the truth?

  A few days ago, the security guards of Wuhan University had a physical conflict with two men who came to enjoy cherry blossoms. With the increasing number of onlookers, the mood of security personnel is heating up.

  Regarding this conflict, Wuhan University responded soon. The school has an unpublished complete surveillance video showing that before this conflict, a female security guard persuaded her to leave for six minutes, because one of the two tourists did not make an online reservation. Because two men were emotional, the female security guard asked for male security support, and the two sides developed from a physical collision to a serious physical conflict. Regarding the kimono regulations mentioned by the security guards, the school said that this year, only appropriate clothing was required, and no provision was made that kimonos were not allowed to enter.

  Tu Shangbiao, director of the archives of Wuhan University, said that the cherry blossoms of Wuda University actually came from the first half of 1939. After the Japanese occupied this place, more than 20 cherry blossoms were shipped from Japan. In fact, there were only 28 cherry blossoms. Now the first generation of cherry blossoms should be gone. After the normalization of diplomatic relations between China and Japan in 1972, the Japanese sent 1,000 cherry blossom seedlings to China. At that time, Premier Zhou said that 50 cherry blossom seedlings would be sent to Wuhan University, and based on this, they gradually expanded. At present, there are more than 1,000 cherry blossom seedlings.

  After the incident, online public opinion continued to revolve around cherry blossoms and kimonos, but the real reason was not so complicated. The female security guard doesn’t know all the history of cherry blossoms. She just wants to stop tourists who don’t have an appointment from entering the park. The conflict is still inseparable from the management problem.

  Li Tianliang, deputy director of the Party and Government Office of Wuhan University, said that the school is not a scenic spot, in fact, it has been scenic, but the school’s many infrastructures can’t keep up, so the management is more difficult. On the one hand, we want to maintain our normal teaching, scientific research and office order as much as possible, and our school also tries to provide the best cherry blossom viewing experience for tourists who come to the school, but the balance between the two is very difficult to find.

Which hybrid technology is stronger? Take stock of the top five hybrid technologies of China brand.

Many years ago, the market was basically monopolized by THS.

The hybrid structure in the form of power split represented by THS, because of its existence, can not be used by other car companies except a few car companies that cooperate with it.

In order to avoid THS patents, many independent brands initially chose PHEV based on P2 hybrid structure when developing hybrid systems.

With the accumulation of experience and technological breakthroughs, China car companies have developed a variety of hybrid structures.

Today, let’s have a dish. What are the characteristics of the hybrid architecture of these five China car companies?

First, SAIC Roewe DMH

New energy plug-in hybrid star:The fourth generation of SAIC RoeweDMH dual-motor plug-in hybridChallenge BYD again.

As we all know, BYD is in the mixed world. However, there is another brand that you don’t know, which is the mixed technology of three generations. The first generation is a similar DM1 hybrid technology, the second generation is a unique hybrid technology with ISG, which is equivalent to BYD’s fourth generation DM4 technology, and the third generation is EDU’s oil-based very complicated single-motor mixed technology. Although the third generation of mixed technology is advanced, it has produced strategic mistakes. Like the first HEV, it made a strategic mistake. In the new energy era, it should not be based on oil, but on electricity. Fuel saving is the key. BYD’s strategy of focusing on electricity remains unchanged, and it has launched a 110km electric cruising range, so it has become the king of plug-in.

Now the fourth generation of SAIC is ready to make its debut, and the new generation of DMH dual-motor hybrid technology has strongly returned to the main track dominated by electricity. The thermal efficiency of its hybrid engine exceeds 43%, based on the hybrid technology of P1+P3 architecture.

SAIC’s fourth-generation plug-in hybrid technology will be first carried to Roewe D7 DMH, with a comprehensive cruising range of 1400km.

Characteristics of DMH, the fourth generation super hybrid technology of SAIC Roewe;

1. Adopt P1+P3 architecture.

2. Series-parallel connection mode, extended range+direct drive, urban low-speed extended range and high-speed engine direct drive.

3. The pure electric motor is in the first gear, and the engine is directly driven in the third gear, and the architecture is adopted (AT power flow is non-inductive).

Summary: low-speed and high-speed range extension saves fuel, high-speed direct driving force is sufficient, and fuel-saving power is given consideration! Shift smoothly without setbacks!

The fourth generation super hybrid technology of SAIC Roewe: DMH dual-motor hybrid technology, which hasUltra-long battery life, ultra-low fuel consumption and super quiet.Three core advantages, the comprehensive cruising range of more than 1400 kilometers is its most noteworthy strength!

DMHDual-motor hybrid technology includes a new hybrid special engine, which exceeds 43%, and the optimal comprehensive efficiency speed range is wider, which can realize full-speed domain and full-scene intelligence and efficiency.

In addition, the engine and the immersed oil-cooled motor adopt coaxial structure design, and its NVH performance is improved by more than 10% compared with similar products with parallel shaft design, which can bring more comfortable and quiet driving experience.

As for the whole new generation Rubik’s Cube battery system, it can support various battery configurations such as lithium ternary system, and adopt efficient and safe CTP technology, innovative lying layout, plus the application of zero-combustion technology, through the five-fold protection mechanism, it can build a solid and reliable security line.

The new generation of Rubik’s cube battery system is also compatible with the leading charging technology, which can support 800V fast charging, achieve the purpose of increasing the battery life by 200 kilometers after charging for 5 minutes, and also support the fastest battery change in only 2 minutes and 30 seconds!

Second, BYD DM-i

Comment in a word: DM-i is actually a series+parallel architecture.

The system can be driven by electric power depending on the driving motor and large-capacity battery. And its engine can not only generate electricity for the battery in series, but also drive the wheels directly or together with the motor in parallel.

However, BYD’s DM-i hybrid system puts more emphasis on the weight position of electric drive.

For example, in the stop-and-go working conditions in cities, the engine rarely drives the vehicle alone or together with the motor, but only plays the role of generating electricity, so that the motor can drive it, thus saving energy consumption.

In high-speed scenes, although the engine will directly participate in driving the wheels, the motor will also play an auxiliary driving role.

Therefore, on the whole, the DM-i hybrid architecture is to let the motor drive the vehicle as much as possible, and the engine is only driven when the power is deficient or the motor consumes a lot of energy when the vehicle speed is high. On the whole, DM-i has the advantages of low speed and low fuel consumption, but the risk of high-speed stall is inevitable.

Third, Geely Raytheon Hi·X

Comment in a word: it is the consensus of many car companies to add, series and parallel hybrid solutions on the basis of BYD DM-I.

Because of this hybrid structure, the high energy consumption range of fuel and motor can be avoided at the same time, and high efficiency can be ensured under various working conditions such as low speed and high speed.

The Hi·X system from Lei Shenqing also uses this concept.

The core system of the Hi·X system is composed of an engine, two motors (a generator and a driving motor), a gearbox (1st gear/3rd gear), a battery and an electronic control system. Among them, the working principle of the Hi·X system with single gear is basically the same as that of the DM-i hybrid system, so I won’t go into details here.

The main feature of Lei Shenqing Hi·X system lies in the 3-speed gearbox, that is, the DHT Pro version.

In parallel (engine direct drive) mode, the engine can be driven as long as the speed reaches above 20Kph. In contrast, the engine direct drive speeds of DM-i and i-MMD are above 70Kph and 80Kph respectively.

With the increase of speed, the engine gear will also increase, which can reduce the speed and control the fuel consumption in direct drive mode.

Therefore, on the whole, the acceleration performance of Hi X (DHT Pro) will be more excellent and the fuel consumption will be fully reduced in theory.

However, due to the existence of the 3-speed gearbox, this system also has the possibility of squatting and rushing during gear shifting.

Fourth, Great Wall Lemon DHT&Hi4;

In a word: provide a more efficient four-wheel drive solution.

In fact, the basic working logic of the hybrid system created by the Great Wall Lemon Hybrid Platform is similar to the multi-gear DHT mode of Lei Shenqing Hi X.

It is also through the way of series+series+multi-gear gearbox to bring diversified driving modes and improve the efficiency of the power system.

However, compared with the Lei Shenqing Hi·X hybrid system, the Great Wall lemon DHT hybrid gearbox has fewer gears, only two gears. That is, high gear and low gear, in the mode of engine direct drive, the speed and torque of the engine can be adjusted by different transmission ratios.

Compared with the current lemon DHT hybrid system, the latest Hi4 hybrid system released by Great Wall is more interesting.

Compared with DHT, the Hi4 hybrid system is equipped with an electric drive assembly, which can distribute the torque through the iTVC system, thus achieving a more efficient and intelligent four-wheel drive mode.

It is reported that in the future, the Great Wall will provide Hi4 hybrid systems for various models, and realize the comprehensive four-wheel drive of hybrid models.

V. Chang ‘an Zhidian iDD

Comment in a word: It seems "old", but it is simple and effective.

Not long ago, "The Second Bomb of Smart Electricity Night in the Era of Wisdom" kicked off.

In this activity, Changan Automobile brought UNI-V Smart iDD, UNI-K Smart iDD, the third generation CS75 PLUS Smart iDD and Z6 Smart iDD and other vehicles equipped with iDD hybrid systems in one breath.

In fact, compared with the current mainstream hybrid structure of independent brands, Changan iDD, a hybrid system based on P2 structure, may seem a bit "outdated" literally.

But is it really backward? Let’s analyze it from the structure first.

Simply put, the P2 hybrid structure is based on the engine+gearbox of a fuel vehicle, and the hybrid evolution is realized by adding a drive motor and a "three-clutch" device between the two.

In terms of working logic, the core of iDD’s hybrid drive is the "three-clutch" device.

In short, this system integrates the clutch (K0) used to control the engine intervention with the traditional dual clutch (K1, K2). When driving in pure electric mode, the K0 clutch is disconnected, and the motor drives the gearbox to transmit power to the wheels. After the K0 clutch is engaged, various modes such as single engine drive, parallel engine motor drive and engine power generation can be realized.

In the actual performance, we take Changan UNI-K Zhidian iDD as an example, which can get a cruising range of 130Km in the state of pure electricity. Moreover, in the feed state, the comprehensive fuel consumption per 100 kilometers of the vehicle is only about 5L, and the maximum cruising range in HEV mode can reach 1100Km. From the point of view of efficiency, although it is a P2 hybrid architecture, iDD also achieves the advantage of low fuel consumption. It can be seen that the P2 hybrid architecture is not old, but before that, the potential of this hybrid architecture has not been stimulated. In order to stimulate the potential of P2 hybrid architecture, Changan Automobile has made sufficient optimization in engine and motor.

As you can see, today’s hybrid car market in China is already full of flowers. Among the five mainstream hybrid systems counted today, most of them are optimized and supplemented on the basis of DHT strong mixing, and on the basis of years of positive research and development, after multi-dimensional optimization, these hybrid structures not only have mature and reliable advantages, but also have a further level of efficiency in actual performance, which can create direct user value for consumers!

At present, SAIC Roewe, BYD, Geely and Great Wall have come up with good answers, but they still have a little PPT to build cars with Changan. Anyway, I still hope that independent brands can flourish in the new energy era and really make good cars that consumers can rest assured.

Of course, it also needs special statement, and the above technical analysis can only be used as a reference. After all, as a hybrid car user, you should have the professionalism of "seeing the efficacy without watching advertisements".A product is a horse, you can’t know until you try it.

"Sucrose-free" does not mean 100% sugar-free.

  The consumption of sugary drinks is considered to be one of the biggest behavioral risk factors that can cause death. Recently, a research paper published in the European Journal of Public Health by Zhou Maigeng and others of China CDC showed that the disease burden caused by the intake of sugary drinks in China increased significantly. When people are generally concerned that drinks and foods contain sugar, some merchants mislead consumers with the concept of "no sucrose". The actual situation is that "no sucrose" does not mean "no sugar", which may also cause consumers to relax their vigilance and consume more sugary foods.

  survey

  Yogurt and beverage in online celebrity are labeled as "sucrose-free"

  The merchant refused to explain whether there was sugar.

  The so-called sugar, because it is composed of carbon, hydrogen and oxygen, is similar to the polymerization of carbon and water in chemical formula, so it is also called carbohydrate.

  A sugary beverage is defined as a beverage in which sugar (any form of sugar, such as brown sugar, corn sugar, corn syrup, fructose, glucose, etc.) is artificially added in the process of making a beverage, and the sugar content exceeds 5%. Common sugary drinks on the market include carbonated drinks, fruit juice, sports drinks, functional drinks, sweetened coffee or milk tea and so on. According to GB28050-2011 national food safety standard "General Principles of Nutrition Labeling in prepackaged foods", "sugar-free or sugar-free" means that the sugar content in solid or liquid food is not higher than 0.5g per 100g or 100ml.

  In recent years, when people are generally concerned that drinks and foods contain sugar, some merchants mislead consumers with the concept of "no sucrose". The actual situation is that "no sucrose" does not mean "no sugar", and "no sugar" does not necessarily mean that it does not contain sugar. This move may also cause consumers to relax their vigilance and consume more sugary drinks.

  Ms. Meng told the Beijing Youth Daily reporter that her children are in the fifth grade of primary school. She pays special attention to the sugar content in the ingredients on the package when shopping for yogurt and drinks on weekdays. Seeing that a online celebrity beverage on a certain platform was marked as "sucrose-free", although the price was two or three times higher than that of ordinary beverages, she ordered several boxes because of online celebrity’s recommendation, high nutritional value and no sugar. The child likes it very much, so she keeps placing orders to buy it. As a result, in just a few weeks, the child was obviously fat. It was not until she found that the "sucrose-free" drink did not contain sucrose, but added fructose syrup, which attracted children to drink, and the sugar content was not "zero" as imagined.

  The reporter of Beiqing Daily asked the merchants, "Does this sucrose-free product contain other sugars?" Later, the customer service of the merchant replied: "This is uncertain. It is recommended to collect it and buy it again." On the homepage, the reporter of Beiqing Daily found a screenshot of the ingredient list of the product, which clearly stated "Yogurt Fighting Sugar and Fat". The ingredient list showed that the carbohydrate content of the product was 4.5%, although it was lower than the general product, but it was not sugar-free.

  expert

  "0 sucrose" and "no sucrose" do not mean "no sugar"

  Sugar-free is not 100% sugar-free.

  Sugar-free is not really 100% sugar-free. Take a zongzi product sold online as an example, some consumers understand that this product does not contain sugar when they see this label, and there is no psychological burden when they eat. In fact, the main raw material for making zongzi is glutinous rice, and the sugar content of 100 grams of glutinous rice reaches 15%. Glutinous rice is also rich in starch, which will be converted into sugar after entering the human body, and the glycemic index is also very high.

  Li Yanju and Zhou Linhua, nutritionists in the Clinical Nutrition Department of Huaxi Hospital, wrote that the so-called "sugar-free" is not as perfect as most people think. For example, sugar-free drinks and sugar-free foods are not 100% sugar-free, and they may gain weight if they drink too much and eat too much. If you see the words "sugar-free, low-sugar, sucrose-free" written on the outer packaging of drinks or foods, according to the standard of GB28050-2011, they mean these things — — Sugar content ≤ 0.5g/100ml, which can be called sugar-free; Sugar content ≤ 5g/100ml, which can be called low sugar.

  In particular, it should be pointed out that sucrose-free means that sucrose, such as white sugar and brown sugar, is not added. Fan Zhihong, an associate professor in the Department of Nutrition and Food Safety, College of Food Science, China Agricultural University, and a doctor of food science, pointed out on social media: "The trouble with sweet drinks is that people unconsciously drink a lot of sugar (or various syrups). In recent years, the change of sugar use is particularly worrying, because drinks, sweets, cakes and even some so-called healthy foods like to sweeten with fructose or fructose syrup. Why? One is that they are sweeter, and the other is that they can be labeled ‘ Sucrose-free ’ The logo. "

  In particular, it should be noted that "no sucrose" does not mean "sugar-free", and the behavior of merchants stealing the concept by playing the edge ball should be criticized. Guo Xiaohui, chief physician of the Department of Endocrinology, Peking University First Hospital, believes that comprehensive measures should be taken in sugar control in China, including clearly indicating the types and contents of various sugars on food nutrition labels, such as sucrose, glucose or fructose, and how many grams they contain, rather than just vaguely indicating them in the ingredient list. The sweetener composition and content of sugar-free drinks should also be clearly marked.

  pay close attention

  Xylitol and other sugar-free foods

  You can’t ignore the sugar in the ingredients themselves.

  In fact, in addition to some "sucrose-free" foods and drinks, there is also a kind of "sugar substitute" foods and drinks that have attracted much attention. There are some "sugar-free" foods on the market for special people such as diabetics, and products using xylitol as sweetener. Relevant medical people pointed out that this kind of "sugar-free food" refers to adding sugar, but it is not really sugar-free.

  Xylitol is a five-carbon sugar, which can supplement energy and improve sugar metabolism. Metabolism in the body does not depend on insulin and does not increase blood sugar concentration. If xylitol is added to biscuits, cakes and other foods to make "sugar-free food", we still need to be vigilant. Because cakes, biscuits and other foods contain a lot of starch and oil, the glycemic index will be high, so it is not recommended for diabetics to eat them in large quantities. (Text/Reporter Yan Lishuang Coordinator/Yu Meiying)

  be relevant

  Excessive consumption of sugary drinks can easily increase the burden of disease.

  Statistics from the National Bureau of Statistics show that the sales volume of beverages in China increased from 97.91 million tons in 2010 to 171.65 million tons in 2019.

  Researchers say that excessive intake of sugary drinks is an important health hazard, as harmful as high BMI (body mass index), high blood pressure, red meat intake, drinking and smoking. With the development of economy and society, Chinese’s diet is gradually changing, from the traditional diet to reducing grain intake, high oil, high salt, high sugar and high meat.

  Based on the research results, the researchers suggest that people in China should pay attention to the problem of excessive intake of sugary drinks. According to the Dietary Guidelines for China Residents (2022), the intake of added sugar should be controlled not to exceed 50g per day, and it is better to control it below 25g.

Why is New Year’s Eve in 2022 not New Year’s Eve? What is the difference between New Year’s Eve and New Year’s Eve

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The Spring Festival in 2022 has no 30th anniversary. Why? Astronomical experts explained that the moon in the Chinese lunar calendar is arranged according to the cycle of the moon’s ups and downs, which is called "Shuowangyue". The average length of a lunar month is 29 days, 12 hours and 44 minutes (29.5306 days), which is not an integer, and the number of days in a month should be expressed in integers, so sometimes it is a small month, 29 days, and sometimes it is a big month and 30 days. At the same time, in order to ensure that the first day of each lunar month must be the new moon, the arrangement of the big and small months is not fixed, which needs to be determined through scientific calculation. So, how to determine how many days there are in a month? Astronomers regularly arrange the first day of each month in the lunar calendar on the day of the new moon, so that the number of days between two new moons is determined.

What is the difference between New Year’s Eve and New Year’s Eve?

First, the name is different.

Second, in the year when there is no twelfth lunar month, New Year’s Eve is the night of the twenty-ninth twelfth lunar month.

Third, to be exact, New Year’s Eve is the night before New Year’s Day.

Why is New Year’s Eve not on New Year’s Eve in some years?

At present, China uses two calendars at the same time. One is the Gregorian calendar, which is commonly used in the west, with 31 days in the big month and 30 days in the small month. There is also a lunar calendar or lunar calendar, which is arranged according to the cycle of the moon’s ups and downs in ancient China, and is called the "Shuowangyue". When the moon is full, it is fifteen, and when the moon is not visible, it is called the first day. However, the average length of a lunar month is about 29.5 days, which is not an integer, and the number of days in a month must be expressed in integers, so sometimes it is 29 days in a small month; Sometimes it’s a big month for 30 days. It’s normal not to be "30".

"From the perspective of the lunar calendar, although most of the time it is the Spring Festival on New Year’s Eve, it is actually normal not to be on New Year’s Eve until the 29 th." Wang Sichao told reporters. It is understood that there was no 30th anniversary before the Spring Festival in 2000, 2001, 2003 and 2006. It is understood that not only the Spring Festival in 2012 (the Year of the Loong), but also there is no 30th anniversary before the Spring Festival in 2013 (year of the snake). Some experts believe that it doesn’t matter whether the Chinese New Year is "30". "People often refer to ‘ New Year’s Eve ’ And ‘ New Year’s Eve ’ As the same day, in fact, the exact meaning of New Year’s Eve is the last day of the lunar year. Astronomically speaking, New Year’s Eve may be the 29th or 30th of the twelfth lunar month.

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"Desire" is too violent to attract dissatisfaction with Tetsuya Nakashima’s apology statement


"Desire" poster

    1905 movie network news The latest suspense masterpiece directed by Japanese director Tetsuya Nakashima, which became a hit, is being shown in Japan. Because it involves a lot of violent and bloody scenes, some viewers are strongly dissatisfied. Some viewers even say that the restricted scenes in the film will make students tend to be violent, so it is suggested to stop the screening as soon as possible. Therefore, director Tetsuya Nakashima issued a personal statement at the first time, "I’m really sorry if I made everyone feel uncomfortable." Apologize to the audience and clarify the original intention of shooting.

    The film is adapted from the original novel Endless Desire by writer Akio Fukamachi, which won the third "Great Mystery Novel" award. Through the gesture of the father (Kôji Yakusho), who used to be a criminal policeman, looking for his missing daughter (Nana Komatsu), the story triggered incredible suspense events. Because the film involved a lot of bloody and violent scenes, it was set as R15+ by the film (no viewing under 15 years old).

    The audience gave mixed comments on the film. The supportive audience said, "I feel the power of this film." The audience who disagreed bluntly said, "This is the worst film I have ever seen, and I hope to erase my memory quickly." "It makes me feel bad." Seeing the audience’s two extreme comments, the director Nakajima issued an apology statement.

    Since the film was released on June 27th, 2014, including on Japanese social networking sites such as Twitter, users’ comments have been polarized, and the sharp contrast between "favorable comments" and "bad comments" has become a hot topic among netizens, even being called "a rare whirlwind of favorable comments and unfavorable comments in recent years" by the industry. Although the film has implemented a low fare of 1,000 yen for students since its release, the audience who saw the film said that "this is not suitable for students to watch." "In short, stop the release quickly!" Wait for radical remarks.

    On the contrary, the audience who hold the view of "approval" said, "Now high school students are not fools. Wouldn’t that kind of lens (referring to violence) make the film more exciting?" In any case, the two extreme reactions of the audience have created a lot of topics and exposure for the film. Is it not worth seeing as the audience said? Let’s ask the audience to go into the cinema and find out for themselves.

    The film "Desire" is being shown all over Japan.


Director’s apology statement

Full statement:

    "Human love and hate are definitely not opposites. Through my ordinary daily life and after the filming of Confessions, I further enhanced my recognition of this feeling, so I devoted myself to the new work with such a mood. The film "Desire" is a film that I think must be filmed.

    The hero of this film is a character who can only get along with others through violence. However, in the process of getting along, that person was also injured, destroyed and lost. The loneliness of that kind of person is doomed to be a life where tragedy and comedy meet. I hope everyone will walk into the cinema and feel the emotional entanglement between the love and hate of a rogue father, Fujishima and the devil’s daughter, and Kanako.

    I’m really sorry if I made everyone feel uncomfortable."

"Desire" director Tetsuya Nakashima

Uncovering Aso’s Ancestor Network with Prominent Family Background


  On September 24th, at the Prime Minister’s residence in Tokyo, Japan, the newly elected Japanese Prime Minister Taro Aso expounded his ruling philosophy at the first press conference after forming a cabinet, and answered questions from reporters. On the same day, Aso was elected as the new Prime Minister of Japan and formed a new cabinet.


  Compared with other western leaders, the frequent change of Japanese prime minister is very abrupt. In the 38 years from 1955 to 1993, there were 16 prime ministers in Japan, and in the 15 years after 1993, Japan replaced 9 prime ministers, including Fukuda. During this period, Japan changed its prime minister every year except Junichiro Koizumi, who was in power for five years and five months.


  However, what is more distinctive than the dazzling change of prime minister is the long-standing and strong hereditary style in Japanese politics. Well, from 1991, when Kiichi Miyazawa became prime minister, of the 10 prime ministers so far, only Tomiichi Murayama has no family political background, and the others have more or less political relatives. This situation has reached a certain extreme level by the 92nd Prime Minister, Taro Aso. By analyzing Taro Aso’s intricate clan relationship network, it is not difficult to understand the mystery of victory in Japan’s political power struggle, which seems accidental but inevitable.


  Haomen network


  Aso has a prominent family background. His grandfather is Ji Tianmao, the 45th Prime Minister of Japan, his father-in-law Zenkō Suzuki is the 70th Prime Minister of Japan, and Aso’s sister Noko is the princess of Prince Tomohito of Mikasa, the younger brother of Emperor Akihito of Japan. In addition, Taro Aso is somewhat related to former Japanese Prime Ministers Ryutaro Hashimoto, Shinzo Abe and Kiichi Miyazawa. The granddaughter of Taro Hashimoto’s grandmother Haruko’s brother, Kyuro Gana, is the wife of Ryutaro Hashimoto, and the husband of Ji Tianmao’s eldest daughter, Haruko, is the cousin of Shinzo Abe’s grandfather, former Japanese Prime Minister Kishi Nobusuke, and the wife of his brother-in-law Suzuki Shunichi is the cousin (or cousin) of Kiichi Miyazawa, and so on.


  In Japanese society, which pays great attention to personal connections and family background, these intertwined and important relationships are the best capital for Aso’s political career. It is very interesting that both Taro Aso and his grandfather Ji Tianmao became Japanese prime ministers at the age of 68. It is a coincidence of fate or the intention of supporters. No one can say clearly, but one thing is certain. This is the dazzling aura of prominent family background, which has added a lot of light to Aso and made Aso even more powerful in politics.


  The birth of a prominent family also prepared a solid economic foundation for Aso. Taro Aso’s great-grandfather, Taj Aso, ran a coal mine in the early Meiji period and became one of the three major coal mine chaebols in Kyushu. Later, he expanded into the fields of railways, electricity and finance, and became a rich man. As a descendant, Aso’s growth in the future is quite blessed by his ancestors’ inheritance.


  Aso was born in Iizuka City, Fukuoka Prefecture in 1940. In the third grade of primary school, he came to Tokyo and went to a school specially for royal children. In 1963, Aso graduated from the Department of Politics and Economics of the University of Learning, and later went to the Graduate School of Stanford University and the London School of Economics and Political Science to study abroad. In 1966, he worked in his own enterprise, hemp production, and in 1973, he became the president of Aso Cement (now Aso Co., Ltd.). Aso was very handsome when he was president. He insisted on his favorite shooting practice and achieved impressive results. In 1976, he actually became a Japanese skeet shooter in the Olympic Games, but his performance was not good, ranking only 41st.


  Prime Minister "Yafu"


  Many industrialists will have political demands after their economic success, and entrepreneurs with political backgrounds are more interested in business and excellence. Aso is no exception. In 1979, Aso was elected as a member of the House of Representatives and stepped into politics.


  Aso has always been one of the few richest parliamentarians. In October 2008, Japanese cabinet members declared their assets, and Aso’s assets were 403.95 million yen (about 28 million yuan), six times that of former Prime Minister Yasuo Fukuda, ranking second in the cabinet, second only to General Affairs Minister Kunio Hatoyama. In addition, Aso has a three-story mansion with a small ocean building in Kamiyama-CHO, Shibuya District, covering an area of 2,400 square meters. In Tokyo, where land is precious, this land alone is worth more than 5 billion yen (about 347 million yuan). When Taro Aso’s father, Taro Aso, was alive, there was a special chef at home to cook French food for him. In his hometown, Iizuka City, there is a homestead of 20,000 ping (one ping is 3.3058 square meters).


  The solid economic foundation has enabled Aso to have sufficient funds for activities. Since 2008, Yasuo Fukuda’s support rate has been declining, and Aso has sought support everywhere to replace Fukuda. It is reported that he often invites parliamentarians to dinner. Japanese people invite people to eat privately, and it is strictly forbidden to use public funds. They all pay for themselves, while prices in Japan are relatively expensive, and most people rarely invite people to eat. But not for Taro Aso, who is quite rich. As long as it is politically necessary, spending money is not a problem. After taking over from Yasuo Fukuda as prime minister in October, Aso, who belongs to the petty faction, often invited people to drink and eat in bars and high-class hotels such as Imperial Hotel, Okura Hotel and Shinotani Hotel in order to get more support.


  When a reporter thought it was "divorced from the common people", Aso replied, "The bar in the hotel is safe and cheap, but fortunately I have money myself", and "the security required to go to an ordinary store and the media attracted will inevitably hinder its normal business". At the same time, Aso questioned the reporter in a tough tone: "Listen, do you have the heart to hinder business? Answer me! "


  Aso went to the "Golden Lion" bar of the Imperial Hotel three times within one month after he became prime minister. The membership fee of the bar was 525,000 yen (100 yen is about RMB 6.9 yuan), and the annual membership fee was 126,000 yen. He spent at least 100,000 yen with several people at a time. Not only does the opposition party criticize this, but some people in the ruling party don’t like it. They think that "although Aso dressed up as a subaltern, the move itself stripped him of his painting."


  But in any case, Aso’s activities can narrow the distance with other political figures and win enough support at the crucial time. In this sense, a solid economic foundation has really helped him to become prime minister.


  Get into trouble because of words


  However, Aso’s political career was not very smooth, except that he was once defeated in the election of members of the House of Representatives after entering politics, and he only succeeded in striking the throne of the Prime Minister four times. In fact, Aso’s first two defeats have nothing to say, because his competitors Junichiro Koizumi and Shinzo Abe are too strong, and the third defeat with Yasuo Fukuda can be said to be that the cooked duck flew away. After Shinzo Abe’s sudden resignation in September last year, various opinion polls showed that Aso had the highest voice as prime minister, and party member voted for Aso above Fukuda in the election for the president of the Liberal Democratic Party. However, due to the encirclement of Aso by various factions and the support of Fukuda, Aso was finally defeated. Until the fourth election for the president of the Liberal Democratic Party, people who opposed Aso were also active. It was only because there were too many candidates who confronted Aso, and none of them were popular, that the encirclement network was not formed and Aso won.


  However, there are indeed many people in the Liberal Democratic Party who oppose Aso as president, which is directly related to his outspoken personality. Because of this long-standing reason, Aso has long been nicknamed "Big Mouth" and "Poisonous Tongue Home".


  In May 2003, when Aso gave a speech at the University of Tokyo, he thought that when Japan occupied Korea, Koreans changed their names to Japan, "Chuang’s name was changed voluntarily by Koreans". In a speech in Nagoya in January 2006, Aso said that "it is best for the emperor to visit the Yasukuni Shrine". Two months later, when he spoke in the Senate, he called Taiwan, China a "country". In October, 2006, Nakagawa Shoichi, then president of the Political Bureau of the Liberal Democratic Party, was criticized for saying that nuclear weapons should be considered as an option, while Aso expressed his support for Nakagawa Shoichi, saying that "when neighboring countries have (nuclear weapons), it is necessary for (Japan) to hold various discussions as an idea". By February 2007, Aso claimed that "forced slavery by the Japanese army" and "there is no objective factual basis at all".


  In addition to making frequent diplomatic gaffes, Aso often "slips of the tongue" on domestic issues in Japan. When he was elected to the House of Representatives in 1979, a reporter asked him if he could become the "future prime minister". Aso replied hotly that the premise was that "the old members must die". Later, Aso was often protested by people inside and outside the government because he said that giving women the right to participate in political power was the biggest failure and satirized Alzheimer’s disease. Although Aso has apologized for these gaffes many times, it seems that he can’t change his words because of his heart and personality.


  Aso’s diplomatic arc


  In terms of foreign policy, Aso advocates strengthening the Japan-US alliance. He believes that it is the wisdom that all children know to form an alliance with the strong when they can’t beat others. Because he has been a foreign minister for a long time, Aso has been to many countries, but his relationship with the current US President Bush is quite tacit. He highly praised Bush’s value diplomacy, and believed that it was easy to have good relations with countries sharing common values in freedom, democracy and legal system.


  Aso himself also "developed" value diplomacy, which is the "arc of freedom and prosperity" he proposed. He believes that the East and the West were opposed during the Cold War, and the socialist countries adjacent to Japan were dangerous arcs. Now these countries are "democratic" and "free" and divorced from the Soviet Union. Japan should lean toward these countries in terms of government development assistance, help them prosper, and make the dangerous arc "the arc of freedom and prosperity", which means to contain China. At the same time, however, Aso believes that the rising China is not a threat from Japan, and the result of mutual competition between the two countries is to improve together and emphasize the common interests of the two countries.


  When Aso was foreign minister, he didn’t visit the Yasukuni Shrine because of his sensitive identity. On this issue, his point of view is against the politicization of the Yasukuni Shrine, and he thinks that the sacrifice of Class-A war criminals in the Yasukuni Shrine is a manifestation of "politicization", so he opposes doing so. However, he also opposed the establishment of alternative facilities for the Yasukuni Shrine, because the Yasukuni Shrine has the collective memory of the Japanese and is irreplaceable. Aso advocated that the Yasukuni Shrine should stay away from politics, let ancestors stay away from the noise, and let people pay homage quietly. The method is to make the Yasukuni Shrine a special legal person according to the principle of separation of church and state. These ideas are clearly written in his two books, Boundless Japan and Arc of Freedom and Prosperity. (He Degong)

Editor: Xun Zhiguo

C919, driving the industrial chain to fly together.

  On May 28th, the first commercial flight of C919, China Eastern Airlines MU9191, arrived safely at Beijing Capital International Airport, marking the successful completion of the first commercial flight, officially entering the civil aviation market and starting a new journey of market-oriented operation and industrialization development.

  Photo by Wei Meng (Xinhua News Agency)

  The 12-inch hanging display in C919 cabin supports high-definition 1080P movie screening.

  Wang Chushe (People’s Vision)

  With the C919 successfully completing its first commercial flight and officially entering the civil aviation market, the vast number of passengers can travel by domestic large aircraft!

  It not only takes passengers into the blue sky, but also puts domestic large aircraft into commercial operation, which also has a strong driving effect on the overall development of China’s civil passenger aircraft industry chain, thus promoting the upgrading of domestic aviation industry.

  The cause of large aircraft has embarked on a new journey of large-scale and serialized development

  Why is the big plane so concerned? C919 large passenger plane is the first jet trunk passenger plane with independent intellectual property rights developed by China in accordance with internationally accepted airworthiness standards. Type certificate was awarded by the Civil Aviation Administration of China after it was established in 2007, made its first flight in 2017 and completed all airworthiness certification in September 2022. C919 is the first truly large civil aviation aircraft in China after Yun -10.

  The C919 large passenger plane on this commercial maiden voyage was developed by Commercial Aircraft Corporation of China (hereinafter referred to as "China Commercial Aircraft") and delivered to China Eastern Airlines on December 9, 2022. After delivery, it intensively completed 100 hours of verification flight, and comprehensively tested the aircraft’s route operation capability.

  "After several generations of efforts, China’s civil aviation transportation market has a jet trunk aircraft independently developed by China for the first time, and the large aircraft industry has entered a new journey of large-scale serialization development." Wei Yingbiao, deputy general manager of Comac China, said.

  At 8: 25 on May 29th, China Eastern Airlines flight MU9197, which was carried by C919 passenger plane, took off from Shanghai Hongqiao Airport with 135 passengers and landed smoothly at Chengdu Tianfu International Airport at 11: 05. C919 started normal commercial operation. Many passengers reported that the flight was smooth, the cabin was spacious and the seats were comfortable. The experience of domestic large aircraft was really good!

  At present, China Eastern Airlines and China Commercial Aircraft have signed five purchase agreements for large aircraft, and the subsequent introduction plan will be decided according to the actual operation and the company’s aviation network planning. China Eastern Airlines has specially set up the flight department and cabin department of C919, and set up professional departments such as C919 dispatching and releasing seats and domestic aircraft maintenance management center. According to the plan, C919 is located in "Shanghai Hongqiao — The initial commercial operation was carried out on the Chengdu Tianfu route. After the introduction, this model is expected to be gradually extended to more routes. The person in charge of China Eastern Airlines Sichuan Branch said that the world-class airport group in Chengdu-Chongqing area is under construction, with great development potential and promising market prospects. The daily flight volume of Eastern Airlines "Shanghai-Chengdu Route" exceeds 20 flights, and C919 is adopted to fly, so the route layout is more calm.

  By the end of last year, C919 had accumulated 32 customers and 1,035 orders. Orders continue to expand this year. In April 2023, China Commercial Aircraft signed a purchase agreement with HNA Aviation Group for 100 aircraft, including 60 C919 aircraft.

  According to industry insiders, a new type of aircraft needs a series of preparations to fly commercial routes, including the guarantee of airline crew and airport ground services, and these professional guarantees must have corresponding qualifications and experience corresponding training. This is one of the reasons why there are fewer C919 flight routes at present.

  Not only the birth of a product, but also the birth of an industry.

  Large aircraft is known as the jewel in the industrial crown, which is a concentrated expression of a country’s scientific and technological ability, industrial level and comprehensive strength. The commercial operation and mass production of domestic civil large aircraft C919 will drive the development of the whole aircraft manufacturing industry chain.

  Li Xiaojin, director of civil aviation university of china Institute of Aviation Economy, told reporters that the first flight of C919 was not only the birth of a product, but also the birth of an industry. "The big plane is not only to meet the development needs of the aviation field, but also to promote the significant progress of many basic disciplines, help the group breakthrough of key technologies in new materials, modern manufacturing, advanced power, electronic information, automatic control, computers and other fields, and stimulate the development of many high-tech industries."

  Li Xiaojin said that the domestic large aircraft put into commercial operation achieved two "from 0 to 1" breakthroughs. One is technically "from 0 to 1". "A C919 contains more than 4 million parts, each part should be safe and reliable enough, and the assembly and review process also has strict safety standards. On the basis of global procurement, China has produced domestic large aircraft with independent innovation, and gradually increased the localization rate in the process. This is an amazing breakthrough. " Li Xiaojin said. The second is the breakthrough of "from 0 to 1" in the market. Compared with Boeing, Airbus and other countries’ aviation manufacturing enterprises in the same period, domestic civil aircraft manufacturing enterprises have almost started from scratch in terms of market awareness, market ability and market experience. The commercial operation of the first C919 has taken an important step and is also a new beginning.

  The catalogue unit price of C919 is 653 million yuan, which realizes commercial operation and market-oriented mass production, brings business opportunities for upstream and downstream enterprises, and promotes the comprehensive upgrading of the domestic aviation industry chain.

  According to reports, the industrial chain of large aircraft is mainly composed of airframe manufacturing, power plant, airborne system, spare parts and raw materials. Among them, the manufacturing value of airframe accounts for about 1/3, including nose, fuselage, fuselage, hatch, etc., which is mainly borne by enterprises under the aviation industry and has a high degree of localization. At present, the power plant is mainly supported by foreign enterprises, and it is expected to use domestic commercial aero-engines in the future. The high profit rate of airborne system products is attracting a large number of high-tech enterprises to join this field. Parts and components include forged castings, standard parts, electronic components, etc. Many domestic enterprises, including a group of private enterprises, participated. In the process of supporting C919, these enterprises not only obtained orders, but also achieved technological breakthroughs. Raw materials include aluminum alloy, composite materials, titanium alloy, high-strength steel, etc., among which a number of enterprises such as Chinalco and Baosteel undertake heavy responsibilities.

  Civil aviation university of china Institute of Aviation Economics estimates that if the life cycle of civil aircraft is 10 years, the contribution ratio of economic added value brought by large aircraft to China is 1︰86, and the employment contribution ratio is 1︰9.6. Li Xiaojin, for example, said that the outer "shells" of the C919, such as the nose, fuselage, tail and wings, came from China’s Chengfei, Hongdu, Shen Fei and Xifei enterprises respectively, and nearly 300,000 people from various fields participated in the development of the C919 large aircraft, thus cultivating a group of local talents in the field of civil aircraft manufacturing.

  According to experts’ analysis, based on the current input-output ratio of large aircraft of 1︰80, domestic large aircraft is expected to bring a trillion-dollar market scale to industrial chain enterprises while maintaining the current localization rate of C919 unchanged. With the improvement of localization rate, it will drive the industrial chain supply chain to a new level and inject new development impetus into China aviation industry.

  Continue to lay a solid foundation and open up more room for development

  The maturity and large-scale market-oriented operation of an aircraft requires years of continuous optimization and upgrading after entering the commercial operation stage. The successful completion of the first commercial flight of C919 is not only a historic moment for China’s large aircraft industry, but also a new starting point for China’s civil aviation industry.

  According to the previous analysis by Mercator China Institute, a German think tank, small batch production is not feasible due to the high development cost of passenger aircraft, and the domestic market size in China undoubtedly provides an important local advantage for C919 mass production. C919 has broad development space, and it can enter foreign markets and participate in global competition in the future.

  Relevant data show that in the next 20 years, more than 40,000 civil airliners will be delivered worldwide, with a value of more than 6 trillion US dollars. Among them, China aviation market is expected to receive more than 9,000 new aircraft, worth about 1.39 trillion US dollars. Facing more and more orders, how can C919 achieve lean mass production and high quality delivery?

  "This tests the core competitiveness of related companies." Li Xiaojin said: First, airlines should timely and comprehensively feed back the accumulated experience in subsequent commercial flights to manufacturers, and support Comac China and related suppliers to gradually improve the technical details. Second, the manufacturer should break through the core technology and material barriers as soon as possible. The value of self-sufficient parts in China is not high enough in the total number of large aircraft, especially the lack of materials and technology such as aero-engine blades. Breaking through these bottlenecks will be the key to mass production, delivery and cost control. Third, fully learn the successful experience of international cooperation in industries such as high-speed rail and nuclear power equipment, take mastering independent intellectual property rights as the ultimate goal, adhere to the necessary conditions for independent design, and persist in mastering high-end technical capabilities to strive for a favorable position in international cooperation in the large aircraft industry.

  Facing the huge international market, domestic large aircraft need to continue to lay a solid foundation in industrial chain upgrading, market expansion and commercial operation, and open up more room for development.

  "The huge scale of China’s civil aircraft market is the advantage of China’s development of domestic large aircraft. The needs of passengers and shippers must be regarded as the starting point and the foothold of civil aircraft development." Li Xiaojin said that it is necessary to promote the integration of aviation manufacturing and air transportation, that is, "the integration of the two airlines", including the integration of ideas, talents, services, standards and work.

  He said that breakthroughs can be made in both soft and hard aspects in the future. The first is market capacity and policy system. Domestic civil aircraft should rely on the big market in China, and in this process, strengthen the market concept, enhance the market capability and improve the legal and regulatory system. The second is core technology and core materials. Taking the operation of C919 as an opportunity, we will persist in independent innovation in the process of global opening-up and speed up technological breakthroughs in core products such as engines, landing gears and airborne equipment.

  In the future, more and better domestic large aircraft will soar above the blue sky.

"Mission Impossible 7" is finalized. On July 14th, Tom cruise’s life-threatening challenge is impossible.


1905 movie network news The official announcement of the new series of agent IP "Mission Impossible" produced by Paramount Film Company of the United States, which is popular all over the world, was made on July 14th, and a preview and poster were released. In the film, Tom cruise once again staged exciting dramas such as cliff racing, desert gun battle, close combat, and short-distance car racing. All kinds of realistic real-life shooting scenes that were overwhelmed made expectations soar, which shocked the audience and also aroused the curiosity of countless audiences! Where did this confusing "fatal liquidation" come from, and what kind of risks will Tom cruise and his IMF task force face? The soul-stirring "impossible task" will start immediately, and join hands with Tom cruise to challenge!


Tom cruise will fight for the ultimate firepower upgrade! IMF task force caught in "fatal liquidation"


In the release of the preview, the exciting action scenes with suspenseful tension are impacting the eyes of countless viewers. In the tense atmosphere, I saw Ethan, played by "Brother Tom", driving his motorcycle to an abrupt stop on the edge of the cliff. The gun battle in Huang Gai’s eyes and the hand-to-hand combat hanging in the night took turns to stage a new challenge to break through the limit! At the same time, kittredge, who was Ethan’s boss and IMF director in Mission Impossible 1 in 1996, reappeared after many years. He said to Tom, with a complicated look, "A person’s life is decided by personal choice, and this task will make you pay a huge price". Hearing this, Tom cruise shook his head firmly and denied it. However, as soon as the camera turned, Tom cruise broke through many obstacles, looking at the IMF task force members who were advancing and retreating with him, his face was stagnant: "He knows the best way to find me is through you." His dignified expression revealed a faint worry, which made people wonder what kind of shocking conspiracy was behind it. The cliff flying car that broke through the sky, the powerful and unstoppable fire blasting, and countless disasters threatened the lives of Tom cruise and members of the IMF task force. In the face of all this, Lu Se (played by Wen Rams), a teammate who fought side by side with Ethan for many years, insisted: "Our lives are not as good as this mission …" The suspense escalated in an all-round way and "fatal liquidation".Detonate the expectations!


In addition, in the finalized posters released simultaneously, not only familiar faces such as Tom Cruise and, Rebecca Flossen, Wen Rams gathered strongly, but also two new actors joined the show, and at the same time, the villain played also appeared mysteriously with a knife in his hand, and the confrontation between good and evil was imminent!


500 parachutes! 13,000 motorcycle leaps! Tom cruise "desperately saburo" returns!


Thrilling and realistic action scenes and suspenseful plot design have always been the important highlights of Mission Impossible movies! In particular, the on-the-spot shooting that tries to bring the greatest visual impact and Tom cruise’s adventurous spirit that challenges all the impossible make Mission Impossible series still popular all over the world after 27 years. In this movie "Mission Impossible 7: Fatal Liquidation (I)", Tom once again challenged his limits and staged a cliff ride of more than 3,000 meters! I saw him jump from the cliff and go straight to the clouds with his motorcycle. In order to shoot the best and most exciting picture presentation effect, and at the same time, in order to make all viewers have a more immersive experience when watching movies. Tom started the "desperate" mode and made full preparations before the shooting. Not only did he skydive 500 times and jump 13,000 times on his motorcycle, but he also jumped off the cliff six times in one day when he really started shooting! The professionalism is amazing, just as he said: "It is not enough to be careful, but to be the best!"


Tom cruise is here with a fatal reckoning! Netizens boast that "if you don’t watch it, you will suffer a big loss."


Since the movie Mission Impossible 7: Fatal Liquidation (I) was announced to be released in China, it has gained the expectations of countless netizens and triggered a heated discussion on the whole network! In particular, Tom Cruise responded enthusiastically to the new "Impossible" by coming back with the "Mission Impossible" series after five years. For the audience, Tom cruise injected an irreplaceable soul into the Mission Impossible series for the sake of film effect and the spirit of insisting on challenging himself, which made the film leave countless classic pictures worth remembering. This persistent persistence is admirable and they all said, "Ah, ah, I can finally see Tom cruise again! Every one looks good! " "I haven’t seen the" Mission Impossible "series in 2023, which really hurts!" "This time, Tom will challenge himself to ride over the cliff, and I am very much looking forward to it!"


Mission Impossible 7: Fatal Liquidation (I) is produced and directed by American Paramount Film Company, with Tom Cruise, simon pegg, Rebecca Flossen, vanessa kirby, Wen Rams, and others returning to star, and hayley atwell and Pom Klementieff newly joining. The film will be released nationwide on July 14th, 2023, so stay tuned!


[Deep Science Popularization] What exactly is nuclear wastewater? What can we do in the face of nuclear wastewater

  On April 13th, 2021, the Japanese government announced that it would discharge the nuclear waste water stored in the Fukushima Daiichi nuclear power plant of Tokyo Electric Power Company into the sea, and the total amount of discharge would exceed 1 million tons, which caused an uproar all over the world.
Nuclear wastewater, what is nuclear wastewater, and what can we do in the face of nuclear wastewater?
  (This is the Fukushima Daiichi nuclear power plant in Japan, which was filmed on April 13th. Xinhua News Agency/Kyodo News Agency)
Nuclear wastewater, what is nuclear wastewater, and what can we do in the face of nuclear wastewater?
  (On April 13th, a citizen browsed the news of Japan’s decision to discharge Fukushima nuclear sewage into the sea through his mobile phone in Tokyo, Japan. Xinhua News Agency reporter Du Yiyi photo)
  I. Unveiling the Mystery of Nuclear Waste Water
  At the beginning of the article, let’s first understand what nuclear wastewater is. Under normal circumstances, the nuclear waste water we refer to refers to radioactive waste liquid which contains radioactive elements and thus has certain radioactivity. So where did these waste liquids come from and how were they treated?
Nuclear wastewater, what is nuclear wastewater, and what can we do in the face of nuclear wastewater?
  (This is the nuclear sewage storage tank of the Fukushima Daiichi nuclear power plant in Japan, which was shot on February 13th. Xinhua News Agency/Kyodo News Agency)
  As we all know, water resources are an important element to ensure the normal operation of nuclear power plants. The production water of nuclear power plants is mainly cooling water, and the cooling mode of coastal nuclear power plants generally adopts seawater direct current cooling, so the amount of fresh water used is less. However, inland nuclear power plants not only need a large amount of water, but also require high water quality, and the normal operation of nuclear power plants cannot be separated from a stable supply of water resources, so they need a high water supply guarantee rate. The annual water consumption of a single million installed units in nuclear power plants with circulating cooling mode is 40 million ㎡, and the water withdrawal is about 11 million ㎡. In order to ensure that the concentration of radioactive elements in the discharged waste liquid reaches the safety standard, a considerable amount of water must be required for dilution.Therefore, the water resources condition is one of the key factors in the site selection of nuclear power department, which requires sufficient and reliable water resources guarantee, and fully considers the water quantity and water resources dispatching conditions during the extremely dry period.
  Long-term discharge of low-level radioactive waste water will lead to the formation of radioactive element enrichment areas in areas with weak water flow exchange, and can also form radioactive element enrichment through sediment adsorption, food chain transfer and groundwater lateral infiltration, which will affect the downstream water quality. The sudden events of inland nuclear power plants have potential risks to the water supply safety downstream of them. Once the nuclides in the nuclear island leak out and enter the downstream water body, it will have a great impact on the safety of downstream water supply.
  The increasing shortage and pollution of water resources in China, as well as the increasing water quantity and population of river-type drinking water sources, have become the main limiting factors for the development of inland nuclear power construction, and the water resources management of nuclear power construction projects has also received widespread attention from the society. Under the new situation that the country implements the strictest water resources management system, the water resources management of nuclear power construction projects will also be highly valued. This shows that the water demand of nuclear power plants is huge.
  Fresh water resources will form radioactive wastewater containing radioactive elements after being used by nuclear power plants.Under the normal operation of nuclear power plants, radioactive elements in radioactive waste liquid mainly come from radionuclide ions produced during fission and activation. During the operation of the reactor, the dissolved boric acid in the primary coolant reacts to produce tritium, which causes the tritium concentration in the coolant to increase and accumulate. However, there is no economically feasible technology to separate tritium from the primary coolant, so we can only adopt the way of discharging coolant to maintain the activity level of tritium in the primary coolant, and the discharged coolant is the main source of radioactive waste liquid in nuclear power plants. Tritium, fission products from fuel, fission products from fuel pollutants and activated corrosion products are the main components in radioactive waste liquid.
Nuclear wastewater, what is nuclear wastewater, and what can we do in the face of nuclear wastewater?
  (Nuclear waste water storage tank photographed in Fukushima Daiichi nuclear power plant, Japan. Xinhua News Agency)
  At present, there are many ways to treat the radioactive waste water produced by nuclear power plants under normal working conditions, such as flocculation, filtration, evaporation, ion exchange, membrane separation technology, etc., so that the radioactive elements contained in it can be reduced to within the standard range and then discharged into the receiving water body. In reality, engineers will adopt different treatment processes or reasonable process combinations according to water quality conditions, so as to achieve ideal treatment results.
  After a series of treatments, the radioactivity of radioactive waste liquid becomes very low, which we call low-level radioactive waste liquid.Although its radioactivity level is very low, China has issued relevant emission standards to fundamentally ensure the safety of people’s production and life, such as the dual control of concentration index and total index of low-level radioactive substances in nuclear power drainage, and requires relevant units to attach great importance to the design of the discharge mode of low-level radioactive waste liquid from nuclear power and create more favorable dilution and diffusion conditions as much as possible.
Nuclear wastewater, what is nuclear wastewater, and what can we do in the face of nuclear wastewater?
  Second, the appalling nuclear accident in history
  Although people have accumulated a lot of experience in the use of nuclear energy, and the security technology has become more and more mature, these valuable experiences have been returned by a series of regrettable disasters. Let’s briefly review several relatively serious nuclear accidents in human history.
  1. Three Mile Island nuclear power plant accident
  Three Mile Island Nuclear Power Plant is located near 16km southeast of Harrisburg, the capital of Pennsylvania, USA. Its Unit 2 (TMI-2) is a 950MW electric power (880MW net electric power) pressurized water reactor designed by Babcock and willcocks and operated by Metropolitan Edison. On March 28th, 1978, it reached the critical point. One year later, on March 28th, 1979, the most serious accident in the history of commercial nuclear power plants in the United States-Three Mile Island nuclear power plant accident occurred. The accident started with a transient caused by the loss of water supply. After a series of events, the core melted and a large number of fission products were released into the containment. Although the radioactive release to the environment and the radiation consequences to people and the environment are very small, and the accident rating is only 5, the accident has had a far-reaching impact on the development of the nuclear industry in the world.
  The accident was caused by the accident cooling system of the secondary circuit of the nuclear power plant automatically starting after the water pump in the secondary circuit failed. However, the water in the secondary circuit was still in a cut-off state after the system was automatically started because the workers failed to open the valve of the accident cooling system after overhaul a few days ago. When the temperature and pressure in the reactor rise in this case, the reactor will automatically stop and the pressure relief valve will automatically open, releasing part of the steam-water mixture in the core. At the same time, when the pressure in the reactor dropped to normal, the pressure relief valve failed to return to its seat automatically due to a fault, so that the core coolant continued to flow out and the pressure dropped below normal, so the emergency core cooling system was automatically started. However, the operator did not judge that the pressure relief valve did not return to its seat, but turned off the emergency core cooling system and stopped injecting water into the core. This series of management and operation errors are intertwined with equipment failures, which makes a small failure expand sharply and causes a serious accident of core melting.
  About 70% of inert gas (mainly 133Xe (tritium -133)), 30% of I and 50% of Cs (cesium) and a small amount of other fission products were released into the main cooling system. Some radioactive materials entered the pressure relief box at the bottom of the containment through the open pressure relief valve. After 15 minutes, the pressure relief box overflowed, the bursting valve burst, radioactive water entered the pit, and fission gas entered the containment. After that, a part of radioactive water was sent to the drainage tank in the auxiliary plant, causing some radionuclides to overflow; In addition, the operator opened the main system drainage system, which also caused the leakage of radionuclides. The operator thinks that there is too much water in the main system, so he opens the drain system and introduces part of the coolant into the volume control box through the purification system, thus communicating with the degassing system. The degassing system compresses the released gas to the decay box and discharges it to the chimney through the filter. In the accident, the main system produced a large amount of gas, which made the degassing system overloaded. The gas was discharged from the safety valve of the container control box, and about 5% of inert gas and 10-5% of gaseous I entered the environment.
  Very little radioactive material was released in the accident at Sanli Island, indicating that containment is very important. Although the containment is not absolutely leak-free, it is basically not mechanically damaged. Due to the addition of sodium hydroxide to the containment spray, most iodine and cesium are trapped in the containment. The gas leaked from the containment passes through the auxiliary building, so most radioactive materials are collected by the filter.
  2. Chernobyl nuclear power plant accident
  In the early morning of Saturday, April 26, 1986, the first highest-level 7-level nuclear power plant accident occurred in Chernobyl Unit 4 of the Soviet Union. The accident of this nuclear power plant is a serious accident caused by prompt critical caused by power transient during the test of reactor safety system. The reactor core, reactor building and steam turbine building were destroyed, and a large amount of radioactive materials were released into the atmosphere.
  At the time of the accident, four 1000MW RBMK reactors were in operation, and two other reactors were under construction nearby. The accident of Unit 4 was put into operation in December 1983. The Chernobyl nuclear power plant plans to build eight nuclear power units with 1 million kilowatts of electric power. Under the enthusiasm of building socialism, Chernobyl Unit 1 was put into operation in 1977, followed by Unit 2 in 1978, Unit 3 in 1981 and Unit 4 in 1983. At this time, units 5 and 6 are under construction, while unit 5 has completed about 80% of the project progress, and units 7 and 8 are also preparing to start construction.
  There is no problem for these units to operate under normal and safe conditions. However, in the event of an accident, when a large amount of radioactive material leaks, there is no protective measure to prevent it from entering the atmosphere. The original design of the reactor body and the main cooling circuit of the steam-water separator are respectively placed in the radiation protection shielding isolation chambers of concrete, and these adjacent isolation chambers form the main power house of the reactor, which is not sealed, can not bear the pressure, and can not play the role of containment, and its safety precautions are worse than those of the pressurized water reactor.
  After the Chernobyl accident, the relevant departments have taken many measures to protect the water resources in this area to a certain extent, to prevent radioactive materials from expanding the scope and to avoid further pollution to the local water system.
Nuclear wastewater, what is nuclear wastewater, and what can we do in the face of nuclear wastewater?
  (Near Kiev, Ukraine, the new bunker of Chernobyl nuclear power plant was officially completed, covering the reactor of Unit 4. Xinhua News Agency reporter Chen Junfeng photo)
  In order to prevent rainfall pollutants near the factory from being transferred into important water systems, the Soviet Union set up a meteorological aircraft fleet to eliminate rain clouds, and threw cartons containing special substances into the clouds in the air to disperse the rain clouds. After throwing these "weather missiles", the rainfall within 30 kilometers of Fiona Fang was completely eliminated, and the Dnieper River flowing through Kiev was prevented from causing serious pollution. When cleaning up the radioactive materials in the factory area, in order to prevent the water system from being polluted by radioactive materials caused by rain, the emergency repair personnel temporarily built a dike in the factory area.
  In essence, the Chernobyl accident was a serious accident caused by excessive reactivity, but it developed into the most serious nuclear power plant accident in human history for the following reasons.First of all, the management is chaotic and the violation of regulations is serious. The operator seriously violated the operation regulations during the operation. Secondly, the reactor has serious defects in design and does not have inherent safety. The reactor has a moderate reactivity coefficient. Although the comprehensive power response coefficient is negative at the normal operating point, the comprehensive effect is positive when the east-west power is lower than 20% of the rated power. Therefore, when the reactor runs below 20% rated power, it is prone to great instability. In the presence of various other external factors (the operator has seriously violated the operating procedures for many times), it is this internal and positive reaction coefficient that leads to the prompt critical of the reactor, resulting in the accident of core breakage. In addition, the lack of containment in the nuclear power plant is also a reason for the serious impact on the environment caused by the accident.
  Iii. Fukushima nuclear power plant accident
  This Fukushima nuclear power plant is located in Shuangye County, Fukushima Industrial Zone, Japan, including the Fukushima Daiichi nuclear power plant (6 units) and the Fukushima II nuclear power plant (4 units), all of which use mixed oxide fuel. Unit 1 of the Fukushima Daiichi nuclear power plant was put into commercial operation in March 1971, and Unit 1 of the second nuclear power plant was put into commercial operation in April 1982. The nuclear reactors of Fukushima nuclear power plant are all single-cycle boiling water reactors with only one cooling loop, and steam is directly generated from the core to drive the steam turbine. Unit 1 has been in service for 40 years, and there are many signs of aging, including embrittlement and corrosion of reactor pressure vessels and corrosion of exhaust gas treatment system in heat exchange area. In February 2011, the Atomic Energy Safety and Security Agency approved the application of Tokyo Electric Power Company for extending the life of Unit 1 of Fukushima Daiichi Nuclear Power Plant, and agreed to extend the life of this unit for 20 years, and officially retired in 2031.
Nuclear wastewater, what is nuclear wastewater, and what can we do in the face of nuclear wastewater?
  (This TV screenshot photo shows white smoke after the explosion of Unit 1 of the Fukushima Daiichi nuclear power plant in northeastern Japan on March 12. )
  At 14: 46 p.m. on March 11th, 2011, with a strong earthquake measuring 9.0 on the Richter scale, the power grid system in northern Japan was severely damaged, resulting in a large-scale power outage in northeastern Japan. The operating 1c3 reactor unit of Fukushima Daiichi Nuclear Power Plant, located in the hardest hit area, immediately took emergency measures-stopping the nuclear fission reaction inside the reactor due to the earthquake and power failure. However, there are still a lot of radioactive fission products in the reactor, which still release energy in the form of decay. This part of the decay heat power is between 25 and 45 MW, which is equivalent to 30,000 to 50,000 electric furnaces burning at the same time. If this part of heat is not transferred out quickly by cooling water, the temperature of the reactor core will rise rapidly and be melted down quickly. Therefore, the reactor still needs long-term cooling after it stops running.
  After the external power grid is cut off, the diesel generator set as an emergency power supply automatically starts to maintain the normal operation of the circulating water cooling system of the reactor. However, the secondary disaster caused by the earthquake-tsunami followed. Less than an hour after the earthquake, waves as high as 10m reached the Fukushima coast, while the breakwater of Fukushima nuclear power plant was less than 6.5m The flood rushed into the nuclear power plant, which quickly flooded the emergency diesel generator set on the shore, making the generator set stop working. At this time, the battery as the third set of emergency power supply is automatically connected. However, the battery pack of Unit 1 was exhausted after 1 hour, and the battery pack of Unit 3 was exhausted after 3.5h hours, and the cooling systems of both units were completely paralyzed. The water pump valve of Unit 2 failed after 3 days, and the cooling system also stopped running. So far, units 1 ~ 3 have been in a state of no cooling. Subsequently, the liquid level in the reactor core container drops, and the fuel rods are exposed to water vapor.
Nuclear wastewater, what is nuclear wastewater, and what can we do in the face of nuclear wastewater?
  (This is the No.1, No.2, No.3 and No.4 reactors (from left to right) photographed in the Fukushima Daiichi nuclear power plant in Japan on October 12, 2017. Xinhua News Agency)
  If the exposed fuel rods are not effectively cooled, the temperature will rise rapidly. When the fuel rod temperature reaches above 1200℃, zirconium alloy will react with water vapor to release a large amount of hydrogen, and the heat released by this reaction will further heat the fuel rod. When the temperature reaches 1800℃, the cladding material begins to melt; When the temperature reaches 2500℃, the fuel rods will melt and collapse to the bottom of the core; When the temperature reaches 2700℃, uranium (U) as fuel will form a high-temperature molten state with zirconium as cladding material.
Nuclear wastewater, what is nuclear wastewater, and what can we do in the face of nuclear wastewater?
  (This photo provided by Tokyo Electric Power Company on April 10th, 2011 shows the No.3 reactor of Fukushima Daiichi Nuclear Power Plant. )
  It is roughly estimated that in the accident, Unit 1 may release 300kg of hydrogen, and Units 2 and 3 may release 300 ~ 1000 kg of hydrogen. This part of hydrogen will enter between the pressure vessel (the second protective barrier of nuclear fuel) and the containment (the third protective barrier of nuclear fuel) through the condensate pool. The design pressure resistance of containment is 4 ~ 5 atm. However, if the internal pressure reaches 8atm or more in an accident, it must be depressurized immediately to avoid explosion and serious radioactive leakage. At this point, the only measure is to take the way of bypass deflation to relieve pressure. Therefore, the mixed gas of hydrogen and water vapor with a small amount of gaseous radioactive substances is discharged into the working area at the upper part of the reactor. Because the concentration of hydrogen in the air exceeds 4%, it will explode. Therefore, hydrogen explosions occurred in units 1 ~ 3, which blew up the roof and walls of the upper part of the building. At the same time, radioactive gas entered the environment and formed radioactive pollution. Fortunately, the structure of the lower part of the reactor is very solid, the explosion did not damage the lower part of the reactor, the pressure vessel and containment did not appear serious damage, and most radioactive materials were still shielded inside the reactor.
  When the earthquake occurred, Units 4 ~ 6 were in shutdown for maintenance, and the spent fuel was stored in the storage pool, but it still needed to be cooled. Also due to the lack of power, the water temperature in storage of spent fuel pool rises rapidly under the action of heat energy generated by radioactive decay, reaching a boiling state. With the evaporation of water vapor, the liquid level drops and the fuel rods are exposed, repeating the process similar to the damage of the fuel rods in the core. What is particularly serious is that the storage of spent fuel pool is not a closed pressure vessel, and the generated gas is easy to leak, and the melted solid radioactive materials are easy to be released into the external space, so it is easier to form a large number of radioactive materials to leak, which is more dangerous. A hydrogen explosion also occurred in Unit 4, and the radiation of radioactive materials around it increased after the explosion.
Nuclear wastewater, what is nuclear wastewater, and what can we do in the face of nuclear wastewater?
  (Nuclear waste water storage tank in Fukushima Daiichi nuclear power plant, Japan. Xinhua News Agency)
  In order to prevent the accident from getting worse, Tokyo Electric Power Company used mobile pumps to inject seawater into the reactor core, containment and even the whole building, which was a last resort emergency measure.However, at the same time, a large number of high-concentration radioactive waste liquid is produced. Improper storage or poor treatment of these waste water will produce secondary disasters and create obstacles for subsequent accident treatment.On April 12, 2011, Japan decided to raise the accident level of Fukushima nuclear power plant to the highest level of 7. With the passage of time, the calorific value of nuclear fuel will be attenuated, and with the access of external power supply, the cooling water circulation system of the reactor has been restored, and the situation of the reactors with accidents has been basically stable. At present, TEPCO has begun to clean up the accident site, and the main task is to treat a large number of high-level radioactive wastewater accumulated on the site.
  On April 13, 2021, the Japanese government announced that it would discharge the nuclear wastewater stored in the Fukushima Daiichi nuclear power plant of Tokyo Electric Power Company into the sea, with a total discharge of more than 1 million tons. It is difficult for the Japanese government to convince the world in this way.
  Fourth, the national "nanny level" plan
  With the successful conclusion of China’s 2020 Central Economic Work Conference in Beijing on December 18th, it was clearly pointed out that eight key tasks should be done well next year. This includes doing a good job in peak carbon dioxide emissions, carbon neutrality and other related work. Because of its high quality, stability, cleanliness, economy, safety and other characteristics, nuclear energy has become the main force of new energy in China, and it is an important energy utilization mode to realize peak carbon dioxide emissions and carbon neutrality in China. Its healthy development is of great significance for improving people’s quality of life, protecting the ecological environment and promoting the harmonious development of social economy. However, the explosion of the Fukushima nuclear power plant in Japan has caused serious nuclear leakage accidents and water resources safety hazards, which has put forward new warnings for China’s nuclear power water resources management. In the 14th Five-Year Plan for People’s Republic of China (PRC)’s National Economic and Social Development and the Outline of Long-term Goals in 2035 (the 14th Five-Year Plan), it is clearly proposed to "promote coastal nuclear power construction safely and steadily". After the Chernobyl nuclear accident and the recent Fukushima nuclear accident, people can’t help asking, how should we "safely and steadily" promote the development of nuclear power? Once a similar serious accident happens, what can the country and we do?
Nuclear wastewater, what is nuclear wastewater, and what can we do in the face of nuclear wastewater?
  (On October 12, 2017, in the Fukushima Daiichi nuclear power plant in Japan, the staff used a radiometer to measure the radiation value near the No.3 reactor. Xinhua News Agency)
  First of all, under the normal operation process of nuclear power plants, the radioactive wastewater discharged from them will also have some impact on the surrounding ecological environment. For nuclear power plants, especially inland nuclear power plants, the influence of low-level radioactive wastewater in its backwater on the downstream water quality safety is a matter of great concern to everyone.As mentioned above, the long-term discharge of low-level radioactive waste liquid may lead to the enrichment of radioactive elements in areas with weak water exchange, and it can also form the enrichment of radioactive elements through sediment adsorption, food chain transmission and groundwater lateral infiltration, thus affecting the water quality in the lower reaches of the river.
  The actual operation monitoring results and mathematical simulation calculation results of nuclear power plants in service in China for many years show that the radioactive concentration is slightly higher than the natural background value only in a certain area of the drainage outlet, and it will return to the natural background value when it exceeds this area, which has not caused radioactive pollution to the surrounding water environment and has not affected the water quality safety in the area. In addition, according to the test results of the concentrations in nearby seawater, seabed sediments and organisms, the results of the radiation dose estimation study of surrounding organisms, especially fish, show that the biological radiation dose is far less than the internationally recommended non-human biological radiation dose limit, and no harmful reactions to organisms have been observed.Therefore, for a normal nuclear power plant, even if it discharges radioactive wastewater into the surrounding water, its radioactivity level is low, and it will not cause great damage to the surrounding environment and ecosystem.After all, all wastewater discharged from nuclear power plants is allowed to be discharged to the outside world after a series of processes to reduce its radioactive concentration below the standard value.
  Secondly, for the residents, the low-level radioactive waste water discharged from nuclear power plants does little harm to human body. As early as the 1980s, China calculated the concentration distribution of liquid discharge from Daya Bay nuclear power station in the nearby sea area by numerical simulation of tidal current pollution diffusion, and on this basis, calculated the dose equivalent of external exposure to human activities in the sea area and internal exposure to local seafood, and calculated the dose rate of low-level radioactive waste liquid to various marine organisms. According to the calculation results, it is concluded that, The discharge of low-level radioactive waste liquid during the normal operation of Daya Bay Nuclear Power Station is not harmful to the health of residents and has no harmful effect on aquatic organisms. Later, the long-term monitoring and investigation results of the actual operation of Daya Bay Nuclear Power Station also confirmed this conclusion. So you don’t have to worry that the radioactivity of its wastewater will harm your own influence.
  In the event of a serious nuclear accident, everyone does not need to panic, because the country has already made enough emergency plans. The only thing we have to do is to comply with the government’s requirements.
  With the occurrence of nuclear accidents and radioactive hazards in history, the concept of safe nuclear power has been deepened and the safety technology of nuclear power has been continuously developed. Nuclear power developing countries and international organizations in the world have established corresponding nuclear safety systems, including nuclear reactor safety technologies (four barriers, safety injection system, decompression and hydrogen elimination system and other technologies to improve safety margin, etc.), safety management standards for nuclear power plants, storage and management specifications for high and low radioactive wastes, technical standards for radioactive material discharge, and emergency response plans and preplans for nuclear accidents in and outside the plant area. These technical specifications for nuclear power safety mainly prevent the hazards caused by nuclear power plant accidents from the perspective of reducing radionuclide leakage and protecting the public from radiation hazards. Although the above safety technologies and measures have controlled the leakage of radionuclides, it is beneficial to reduce its impact on water safety.
  If the nuclear power accident really happens, the government and relevant departments will quickly start emergency countermeasures because the nuclide will spread rapidly through various media and channels, causing radioactive effects. Emergency countermeasures for nuclear power accidents mainly include the following aspects:
  ① Start the emergency plan for nuclear power accident;
  ② Surface water isolation measures and groundwater seepage control measures under accident conditions;
  ③ Moderate and high-level radioactive effluents;
  ④ Measures to seal the sarcophagus;
  ⑤ Emergency water dispatching and regulation measures under the condition of inland nuclear power accident;
  ⑥ Emergency monitoring of water quality in case of accident;
  ⑦ Water safety information release scheme under accident conditions.
Nuclear wastewater, what is nuclear wastewater, and what can we do in the face of nuclear wastewater?
  In addition, as early as 2016, People’s Republic of China (PRC) Ministry of Water Resources has been drafting the corresponding construction and operation system to ensure the safe and stable operation of China’s nuclear industry. The Guidelines for Water Resources Demonstration of Coastal Nuclear Power Construction Projects (SL/T 777-2019) is one of them. This guideline, issued on May 31, 2019 and implemented from August 31, 2019, gives specific guidance in view of the relevant characteristics of water intake, water use and drainage in the construction and operation of coastal nuclear power. This guideline not only puts forward guiding opinions on liquid radioactive wastewater, but also puts forward corresponding general guiding opinions on common pollution forms such as concentrated brine and warm drainage that may be involved. It can be seen that its consideration is comprehensive. Therefore, as an ordinary person, resolutely obeying the government’s command and cooperating with relevant departments is our best performance in reducing accident losses.
  The above are some measures taken by China to promote the development of nuclear power safely and steadily, and I hope that more targeted guidance and regulations can be put forward in the future to protect the stable and reliable operation of nuclear power.
  (Author: Fan Guohua)
  Scientifically: Professor and Doctoral Supervisor of Environmental Science and Engineering, North China Electric Power University, Ding Xiaowen.

Man touched the sun for the first time! Parker probe launched into space.

  CCTV News:Early this morning (12th) local time, that is, this afternoon Beijing time, NASA’s "Parker Solar Detector" was launched from Cape Canaveral, Florida.

  This "car-sized" unmanned probe costs $1.5 billion and is named after American astrophysicist Eugene Parker. It is reported that "Parker Solar Detector" can be closer to the sun than other detectors, which will help people know more about the solar corona and solar wind. The exploration plan is expected to end in June 2025 for a period of seven years.

  Previously, the "Parker Solar Detector" was originally scheduled to be launched in the early morning of the 11 th local time. However, with only 1 minute and 55 seconds left before the launch, the launch was forced to be postponed because the rocket helium device issued a red alarm.

  Parker, the first human coronal probe, stood shoulder to shoulder with the sun.

  As the first "corona detector" in human history, Parker is really shoulder to shoulder with the sun. Although the Parker is only the size of a car, in order to meet multiple tests, scientists armed it with high technology.

  The magical protective cover keeps the detector from being "baked" by the sun.

  The biggest test of detecting the sun is high temperature. When Parker detector works near the sun, it receives about 500 times the solar radiation near the earth. In order to prevent the detector from being "baked" by the sun, engineers designed a protective cover using carbon composite materials. In the working process, the protective cover with a thickness of only 11.43 cm faces the sun, and the highest temperature can reach about 1400 degrees Celsius. However, under its protection, the working environment temperature of the detector is only 29 degrees Celsius, which is cooler than that of Beijing in summer! Although the temperature of the solar wind in the corona is as high as several million degrees, it will not affect the normal work of the detector because of its extremely low density.

  The micro sensor allows the detector to adjust its orientation in time.

  It takes eight minutes for the signal from the sun to reach the earth. Eight minutes may not seem like a long time, but if the instructions are not in place, the Parker is likely to be buried in the sea of fire. Therefore, Parker had a self-protection system at the beginning of its design. Many micro-sensors were distributed on the edge of the shadow of the heat shield. If any one felt the sunlight, the central computer would receive a reminder and adjust the orientation of Parker to ensure safety.

  If all goes well, in 2024, 150 million kilometers away, Parker will send back the first batch of solar data to the earth’s home. Parker is not only exploring the sun, but also exploring the whole universe through the opportunity of exploring the sun.

  Source of this article: CCTV News Synthesis