On the morning of October 8, 1955, the "President of Cleveland" passenger ship departed from the other side of the ocean, arrived in Hong Kong, China after drifting on the sea for nearly a month.

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On the morning of October 8, 1955, the "President of Cleveland" passenger ship departed from the other side of the ocean, arrived in Hong Kong, China after drifting on the sea for nearly a month. There are many celebrities on the ship, but the only one is highly concerned. Every time he goes to a place, people from relevant national departments will raise their hearts to their throats, fearing something happens to him.

This is not who he was hailed by the Americans as the "leader in the field of aerodynamics ".

Not only Chinese people, but even Qian Xuesen is worried about his own safety. On the way back from the United States, he was worried that every stop of the "President Cleveland" did not leave the ship, for fear that if he left this " American Territory ", he would never return to the embrace of his motherland in his entire life. He only breathed a sigh of relief after successfully disembarking in Hong Kong and coming to Shenzhen through Hong Kong.

Shortly after Qian Xuesen returned to China, the more he thought about it, the more he became, the more he was, especially the US Deputy Secretary of the Navy, Daniel Kimbell. He later said furiously: "Let Qian Xuesen return to China is the stupidest thing the United States has ever done." This sentence later evolved into the famous rumor that "Qian Xuesen can match 5 (American) teachers."

So, Qian Xuesen is really so powerful, "can match 5 teachers", so why does Americans regret the fact that they let him come back?

Facts have proved that Qian Xuesen is really worth "5 teachers", or rather, he is many times better than "5 teachers". Before returning to the embrace of his motherland, he was already a very successful person in the United States.

Since he became a professor of Caltech in 1949, he has won three major gains that others have been pursuing throughout their lives: success in their career, success, and a happy family.

In terms of career and reputation, some people believe that during the period at Caltech, Qian Xuesen's reputation was comparable to his mentor Von Carmen.

Von Carmen is not an ordinary person. He was later named the greatest aerospace engineer of the 20th century and the "scientific genius in the aerospace era". It is conceivable how high Qian Xuesen's status in the United States was at that time, at least very popular in the field of science in the United States.

In fact, in addition to attracting great attention in the industry, some of Qian Xuesen's reports have also caused quite a stir and won the favor of Americans.

In December 1949, the American Rockets Association held an annual meeting. Qian Xuesen was invited to attend the meeting as a military consultant, director of the Guggenheim Jet Propulsion Center, and a professor named "Goddard" of California Institute of Technology. In the annual meeting report, the fresh concepts of "intercontinental transport rockets" and "rocket manned" he elaborated have attracted media attention, and mainstream American media such as " New York Times " and "Time" are rushing to report.

Through the report, Americans are discussing the unheard-of topic of "with this future transportation that looks like sharpened pencils, people will be able to fly from New York to Los Angeles in an hour."

It can be seen that Qian Xuesen was very successful at that time and did a very good job in the American and overseas Chinese circle.

Family, Qian Xuesen lives as wonderful as the male protagonist in the novel.

Qian Xuesen was born in 1911. By 1949, he was 38 years old and happened to be " forty years ". But at that time he still looked like he was only in his 20s, handsome, humble, and full of personal charm.

His personal charm is enough to attract others. His combination with Jiang Ying adds this attraction, which is enviable.

Jiang Ying is a famous high-pitched singer, elegant and beautiful. When a person who often interacts with Qian Xuesen wrote to Von Carmen, he couldn't help but praise: "We all fall in love with Mrs. Qian!"

One man and the other is a beautiful woman. Such a combination is the most ideal. It is precisely because both of them are full of charm that they become the center of the social circles they are connected to.In this circle, there are both Chinese and overseas Chinese from Tsinghua , Shanghai Jiaotong University , as well as American friends such as California Polytechnic and Jet Propulsion Laboratory .

Whenever Qian Xuesen gathers these friends, Qian Xuesen will cook for them personally. Jiang Ying, who has prepared a day for the party, sat quietly aside, watching Qian Xuesen busy happily...

A successful career, a better than her, a beautiful wife, and a full of guests. Qian Xuesen's achievements and lives are what many people dream of throughout their lives.

However, after time came to 1949, Qian Xuesen's career and life began to undergo earth-shaking changes, and everything was no longer the same as before.

In 1949, many major events that affected the world pattern occurred. In August, the Soviet Union successfully exploded the first atomic bomb, , becoming the second nuclear-capable country after the United States; in October, New China was founded, and the Chinese people stood up since then.

As for these two major events, the result is to make Sino-US relations subtle.

Qian Xuesen also noticed these changes. In a letter to his friend Malina, he said with excitement and confusion: "The situation in the East is changing very quickly. I really don't know what my future will be like. But perhaps, no one is sure of his future."

shows that Qian Xuesen had linked his personal future and destiny with the future of his motherland at that time, and began to consider returning to China.

This makes people wonder, he puts the comfortable life of the United States, but why is he worried about the fate of the motherland and his personal? If it were others, most of them would choose to ignore it. Lin Hua, an authoritative figure in the field of missiles and in the United States, is a typical example in this regard.

But, can people like Lin Hua compare with Qian Xuesen?

Some people say that Qian Xuesen's swing only started after reading a letter in May 1949.

This letter comes from China and was written by Professor Cao Richang, who was then a professor of , a member of the Communist Party of China at the time.

Interestingly, Cao Richang and Qian Xuesen had never had any contact at that time. When Cao Richang wrote a letter to Qian Xuesen, he mainly followed the organization's arrangements.

This means that the "Red China" that is about to win national victory has taken the initiative to throw an olive branch to Qian Xuesen.

In the letter, Cao Richang said to Qian Xuesen: "The national liberation is about... If you can leave your work in the United States, I hope you can return to China soon and lead the establishment of the aviation industry in Northeast China or North China."

According to the format of the letter and the background of Cao Richang and Qian Xuesen's never known each other, although the words of this letter are sincere, it inevitably reminds people of the possibility of "group sending". Qian Xuesen received this letter, and other outstanding Chinese and overseas Chinese in the United States may have also received it. The only difference is that Qian Xuesen took this matter to heart, and some people either put it aside or threw it directly into the trash can, for fear of being discovered.

Just as Cao Richang wrote to Qian Xuesen, Qian Xuesen received another letter from his father. Qian’s father’s main meaning was the same as Cao Richang. Qian's father said in the letter: "Life has a root system... The root of the child's life should be a nurturing your motherland... It is a metaphor for repaying the kindness of raising you. I hope the child will think twice."

Qian's father is very wise and has a good understanding of his children. He also hopes that his son can become a person who can repay kindness, rather than a "fake foreign devil" who forgets his ancestors.

In front of the invitation from the Communist Party of China, and later from the earnest teachings from his father, which made Qian Xuesen think more about his personal future and destiny and the future of the motherland.

In fact, without reminding his father, Qian Xuesen already knew that during his study and employment in the United States, he was preparing to serve his motherland in the future. He has said more than once: "I have been in the United States for so long and never thought of staying there for the rest of my life..."

Through this sentence, we can see that his thoughts at that time were the same as Qian's father-the root of life lies in "raising your motherland", the United States that everyone yearns for.

Qian Xuesen is not empty talk or fantasy. He proved everything with practical actions.

In daily life, many Chinese and overseas Chinese in the United States have tried their best to save money in order to stay in the United States and enjoy a happy life in their later years. Although Qian Xuesen's salary is high, he "don't save a dollar."

In his later memories, he explained this action and said, "Because I am Chinese, I don't plan to live in the United States for the rest of my life!"

has no way out in life in the United States. In terms of learning, he mainly made two preparations: one is to study hard and learn knowledge useful for the construction of the motherland; the other is to collect a large amount of books and materials to prepare for the construction of the motherland in the future.

It is through such efforts that he has achieved amazing achievements and has become the "leader in the field of aerodynamics" in the United States and even the world.

However, his achievement has also become his biggest bond to return to China.

In June 1950, after the second child was born, considering that long-distance travel would affect the child, Qian Xuesen had the idea of ​​returning to his motherland.

But he just thought about it and immediately touched the nerves of the US government, making them sensitive. They began to "take measures" against him, and his journey to return home became more difficult.

June 6, the sky was raining all the time, and two agents FBI broke into Qian's house and found Qian Xuesen. The agent's purpose is very simple - check whether he is a Communist Party member, or whether he has joined . The American Communist Party .

Their blatant actions are mainly based on the fact that Qian Xuesen's friends at Caltech are all Communists of the United States; furthermore, when the 122 professor group of the Pasadena branch of the United States held a secret meeting at the home of Wiinbaum, the assistant chemistry at Caltech, Qian Xuesen also participated, and was related to the pseudonym "John M. Decker" on the list of the Communist Party of America.

Qian Xuesen of course denied these "accusations" of incomplete evidence and refused to betray any of his friends. After he did this, he not only failed to get rid of suspicion, but instead received more speculation.

von Carmen and California Institute of Technology dean Dubridge both said: "Because money refuses to expose his friends, it aroused the suspicion of the FBI !"

This slapped many people in the face, saying that "science has no borders". When political issues are really involved, even the United States itself will take no polite measures against scientists within its jurisdiction.

The FBI agent's investigation of Qian Xuesen this time was not carried out suddenly in June 1950, but started very early. The US government called it "Loyalty investigation."

It can be seen that Americans have never trusted Qian Xuesen.

According to data, the earliest "loyalty investigation" of Qian Xuesen began in 1942 one after another. By 1946 and 1947, the scope of the investigation was wider, the number of people involved, the number of times increased, and the number of reports was obtained.

The US treats Qian Xuesen like this mainly because he is exerting an increasing influence in the United States.

At the beginning of the end of World War II , Qian Xuesen followed his mentor Von Carmen to Europe for inspection, and then completed many important chapters of the aviation plan formulated by the United States at that time - "To New Altitude", and gradually gained fame in the United States. While

was awarded the honor, there were also various speculations and doubts that were pounced on Qian Xuesen.

In order to understand Qian Xuesen's "loyalty", the CIA and the Department of Justice and other core departments almost investigated Qian Xuesen's "three generations of ancestors" and also checked his teachers, classmates, colleagues, bosses, lovers, and even landlords.

By 1950, the McCarthy wave against communism and the Communist Party swept across the United States, and the "Clearing Communist" movement in the United States entered a mad stage.

Because of these, various "loyalty investigations" have also been moved from secretly to openly, causing the American version of "white terror". Not only Qian Xuesen, but also "top stars" in the American scientific community such as Einstein , "Father of the Atomic Bomb" Oppenheimer , etc., have been suspected, which has caused panic among all sectors of the United States, including the scientific community, to be in panic.

On May 18, 1950, before the American agent broke into Qian Xuesen's house, the U.S. Army, Navy and Air Force held a personnel security meeting. The main topics included studying Qian Xuesen's problems. On June 6, when the agent broke into Qian Xuesen's house, the three armies decided to revoke all his licenses for confidential research, so that he could no longer participate in relevant scientific research in the United States.

Qian Xuesen obtained a confidentiality license in December 1942. 90% of the projects in his jet propulsion laboratory are also confidential, which means that he has been completely bound in the United States and his future will be affected.

More importantly, he has always been proud of his research. The United States's attempt to exploit but extremely speculation and doubt made him feel ashamed and angry and disappointed with the US government.

10 days after being humiliated, Qian Xuesen issued a statement on June 16 saying that "the initial popularity no longer exists, a cloud of doubt is overwhelming" and decided that "the only thing that can be done next is to leave here." He then submitted his resignation to relevant units and departments.

In the next few weeks, many major events occurred in the international community, which made Qian Xuesen more determined to return to China.

On June 25, the Korean War broke out; on June 27, the US government decided to obstruct the People's Liberation Army from liberating Taiwan by force, and sent the US Seventh Fleet into the Taiwan Strait , forcibly interfering in China's internal affairs.

While Qian Xuesen was indignant, he also felt that he had to return to China, otherwise he would not be able to return to China. His close friend, "red scientist" Luo Peilin , also had the same concerns. So, they accelerated the defense and went together to buy the return tickets on the day of the defense.

After various considerations, they found that the US cruise ship "President Wilson" departing from the United States on August 31 is the best choice for returning home. However, Luo Peilin was a student and bought a boat ticket on the spot. The ticket money was paid by Qian Xuesen, so Qian Xuesen himself did not go so smoothly. He was a professor and had to obtain the consent of Immigration Bureau .

As expected, the Immigration Bureau did not agree to Qian Xuesen's return to China.

This is not a problem for Qian Xuesen. He thought of a plan to go to Canada first, transfer from Canada to Hong Kong and then return to China, and prepare to "return to China on a curve". Soon, he booked a flight ticket to the Canadian capital Ottawa on August 28 and successfully purchased it.

But in this joint eye, Qian Xuesen suffered from the "characteristic disease" of Chinese literati and wanted to leave as a gentleman, but did not want to disappear secretly.

He sent a letter to on July 29 to the US State Department , but it was this letter that made his journey to return to China tortuous.

How could the US government let Qian Xuesen go easily for a talent like him who is closely related to the Communist Party?

Even Dubridge, dean of Caltech, said: "This is simply ridiculous. A great rocket and jet propulsion expert cannot get a job in the field he chooses in this country, so he forced him to return to Red China and allow his talents to be displayed in the Communist regime..."

Its meaning is quite clear, that is, he wants Qian Xuesen to stay and work for the United States, and is incredible and indignant about the actions of the US government.

Under the influence of Dubridge, the US government began to waver and decided to hold a hearing on August 23 to rediscuss Qian Xuesen's issue.

Faced with this hearing that was most likely the "Hongmen Banquet", Qian Xuesen disagreed and insisted on the gentlemanly style. He said to Luo Peilin: "If you want to return to China, you must return openly and not leave quietly!"

For this reason, he set out from Los Angeles in person and went to Washington to wait for the hearing to be held.

Dubridge, due to consideration of Qian Xuesen's suspected participation in the Communist Party, suggested that Qian Xuesen seek help from Deputy Secretary of the Navy, Daniel, who believed that Daniel would help him "restore his innocence."

Daniel and Qian Xuesen are old friends. Qian Xuesen's later student Zheng Zhemin When introducing their relationship, he said that Qian Xuesen met Daniel during the process of participating in the "Rocket Club" and cooperating with the US military. They had close contacts, and Daniel was even a "fan" of Qian Xuesen.

According to this, Dubridge's suggestion may be correct.

However, Dubridge's starting point was to help Qian Xuesen prove his innocence and then let him resume his work in the United States, not to help him return to China. So as a friend, will Daniel help Qian Xuesen return to China?

As soon as he saw Daniel, Qian Xuesen confessed to the various injustices he encountered. Daniel was very sympathetic about this, but when he heard that Qian Xuesen wanted to return to China, he quickly changed his face, exposing the appearance of an American politician, and had no friendship at all.

Daniel repeatedly said to Qian Xuesen: "You can't leave, you are too valuable!"

Daniel dared not draw conclusions about the issue of repaying Qian Xuesen's innocence, nor did he dare to get too deeply involved in it. Therefore, he avoided the important things and employed Tai Chi , and said to Qian Xuesen: You can be a mathematician in the United States with peace of mind!

Obviously, Daniel and Dubridge's starting point are the same. Both hope that Qian Xuesen will continue to stay in the United States, even if he does not engage in scientific research.

At this point, Qian Xuesen hasn't found out that he has found the wrong person. Later, under Daniel's secret operation, he almost lost his life.

Daniel not only did not help Qian Xuesen, but also delayed the hearing, which made Qian Xuesen's trip to Washington achieve nothing.

When the plane was 5 days away from the flight to Hong Kong, Qian Xuesen had not yet waited for the desired result. Under helplessness, he had to return to Los Angeles. On his way back, all kinds of bad news followed one after another.

Qian Xuesen just arrived at the Los Angeles airport, and US Immigration officials have been waiting there for a long time. They coldly took out a document restricting their exit and told him: "No leaving the United States!"

Zhang Xianmin later found out that this was what Daniel did. As soon as Qian Xuesen left his office, he called and told the US Department of Justice: Qian Xuesen must not leave the United States!

Restricting Qian Xuesen's departure is just the first step taken by the US government. They have also put many restrictions on Qian Xuesen next, including house arrest and torture of him. After

was restricted from leaving the country, Qian Xuesen refunded the ticket, but his luggage could not be taken back. They had been seized by the US government first.

But Qian Xuesen also knew nothing about this matter, and his wife Jiang Ying discovered it in the newspaper.

Qian Xuesen's luggage weighs 800 kilograms and contains 8 large wooden boxes, including books, furniture, radio, piano, dishwasher, etc. These are all ordinary things, but after officials from the U.S. Customs, FBI, Air Force Intelligence Bureau, the U.S. State Department came to investigate their luggage one after another, they found differences and found that there were academic reports, government documents, and industry reports in the luggage.

These things are the "evidence" of Qian Xuesen's crime of "espionage", but at that time they had not yet found out what these things were, so they made the conclusion of "espionage" too early.

With "crimes" and "evidence", the US government next took common measures - arresting people!

On the afternoon of September 6, 1950, two staff members of the Immigration Bureau broke into Qian's house and formally arrested Qian Xuesen. Next, Qian Xuesen came to the darkest moment in his life.

On September 7, the US Department of Justice transferred Qian Xuesen to Temino Island south of Los Angeles to detain him, and abused him inhumanly here.

Jiang Ying later said that during the 15 days of Qian Xuesen being detained, he was shining in front of his face by a searchlight 24 hours a day. Every 10 minutes, guards opened the heavy, irritating door and peeked inside, for fear that he would run away.

After suffering from this, Qian Xuesen's sleep was deeply affected, his nerves were extremely nervous, and he was losing weight almost at a rate of 1 kilogram per day. When he was finally released, he had lost more than ten kilograms and lost the ability to speak. It took a long time to recover...

Qian Xuesen was able to walk out of Temino Island alive, not because the US government was kind-hearted, but because Dubridge and others strongly supported and created public opinion, and spent $15,000 bail to leave.

After all, the 15,000 US dollars played a role.

According to the bail specifications of the US government for American Communists or other detained persons without reason, Qian Xuesen's price was the highest, which was ridiculously high. Even if he was not a Communist and had no crime, he had to pay the money.

After Qian Xuesen came out, the US government still did not want to let him go. They stipulated that he must report his whereabouts to the Los Angeles Immigration Bureau every month, otherwise the police will come to the door to "visit".

When Qian Xuesen's experiences in the United States spread to China, Premier Zhou attached great importance to it and instructed the Ministry of Foreign Affairs to speak out against the United States and condemn their inhumane behavior. However, because both countries were fighting fiercely on the Korean battlefield at that time, this support did not help Qian Xuesen.

In the following days, the country has been trying every means to help Qian Xuesen return to China, and Qian Xuesen has been waiting for opportunities. This delay took four years in the blink of an eye, and it was not until 1954 that the opportunity came.

In order to resolve the North Korean issue and the Indochina peace issue, China, the Soviet Union, the United States, Britain, France and related countries all came to the negotiating table and held a large-scale meeting in Geneva from April to July 1954. At the

meeting, issues such as the release of prisoners of war and the release of Chinese students in the United States and the return of Chinese students were particularly eye-catching and extremely quarrel.

Although the United States was extremely reluctant to contact the Chinese representatives before and during the meeting and expressed its attitude of not recognizing the new Chinese regime, who was Zhou Enlai who led the Chinese delegation to attend the meeting? He did not get confused because of the US representative's criticism and intentional embarrassment, and he has always grasped the pace of negotiations.

On the surface, Americans "don't want to pay attention to" Chinese representatives, but secretly their attitude is not so stubborn. They asked British Ambassador to China De Williams to be the middleman, and asked De Williams to visit Zhou Enlai, fire the first shot of Sino-US negotiations, and then directly show off the idea of ​​picking up American pilots captured during the Korean War, American expatriates engaged in espionage, and prisoners of war in the ground forces. They no longer had the tough attitude of superpowers.

Seeing that the Americans asked me for help and took the initiative to show weakness, Zhou Enlai seized the opportunity and made a favor, and proposed to release Qian Xuesen and other Chinese expatriates and international students in the United States to return to China, saying that as long as the US side is willing to release them, the relevant US side’s requirements can be considered.

Soon, Zhou Enlai asked Wang Bingnan, Director of the General Office of the Ministry of Foreign Affairs and Secretary-General of the Chinese delegation, to come forward and ask him to negotiate directly with the US Deputy Secretary of State Johnson .

negotiations began on June 5 and did not end until the 21st. They were held intermittently and four times, all of which were discussed around the issues of prisoners of war and Chinese personnel in the United States.

In accordance with Zhou Enlai's request, Wang Bingnan directly proposed the idea of ​​replacing Chinese prisoners of war with prisoners of war, but emphasized that China must "trial" prisoners of war, and then "according to their performance, they can consider commutation of sentences or early release."

To show sincerity, in order to get Qian Xuesen and others to return as soon as possible, we attach great importance to this series of negotiations, and held consular-level talks with the US representatives on July 22 the day after the closing of of the Geneva meeting. At the

meeting, our representative announced on the spot that he would release four US military pilots first as our move to express our sincerity.Although the US side also showed "full sincerity" at the meeting, it was just a show. After China really released the US military pilots, they did not take action for a long time. Johnson even said shamelessly: "Chinese students and Qian Xuesen have no idea of ​​returning to China. Unless China provides evidence that they have such ideas, it will be difficult to execute the exchange!"

It is really a place where there is no silver and shameless. The US side controls Chinese personnel in the United States. Even if they want to return to China, as long as the United States does not want them to come back, China naturally has no way to know their requests and wishes. Isn't this deliberately making things difficult for others?

Because of the rogue behavior of the United States, the negotiations between China and the United States have become increasingly unpleasant, and even fallen into an endless tug-of-war.

In this special period without any progress, a letter signed by Qian Xuesen finally broke all the silence. In the letter, Qian Xuesen expressed his strong willingness to return to China, which just met the requirements put forward by the US side, leaving the US side with nothing to say.

This letter has to start from mid-June 1955.

In a material, Qian Xuesen accidentally saw the Tiananmen celebration photo for China's "May 1" Labor Day. In the photo, he saw Chen Shutong, who had a family relationship with the Qian family.

Qian Xuesen calls Chen Shutong the Tai Master. Through the material introduction, Qian Xuesen learned that Chen Shutong happened to be the vice chairman of the Standing Committee of the National People's Congress at that time, so the idea of ​​ asking for help from Tai came up. How to ask for help from

? Only write letters.

In the letter, Qian Xuesen revealed the truth that the United States does not want to release Chinese personnel in the United States, told his own difficult situation, and expressed his willingness to return to the embrace of the motherland. He said: "Xuesen knew his mistake a few years ago and was detained by the US government. It has been five years since he was detained. He has not been thinking of returning home for a day, a moment, or a moment to participate in the great climax of construction..."

. Naturally, the US government would not let Qian Xuesen send such a letter of help. They have already blocked his connection with his motherland seamlessly.

For this reason, Qian Xuesen can only find another way.

Qian Xuesen discussed with Jiang Ying and asked Jiang Ying to use his left hand to write the letter, first mail it to Jiang Hua, the sister of Jiang Ying who is far away in Belgium , and then asked Jiang Hua to help hand it over to Chen Shutong.

As expected, this trick worked. Chen Shutong received the letter and finally delivered it to Zhou Enlai. In this way, Americans finally have nothing to say.

On August 1, 1955, China and the United States held ambassador-level negotiations. Wang Bingnan took out Qian Xuesen's letter and expressed strong protest to the US side. Then, in accordance with Zhou Enlai's instructions, he increased his bargaining chips and announced the release of 11 US military pilots, but the price was that Qian Xuesen and others had to be sent back to China.

Seeing such attractive conditions, the US side agreed with a smile and asked the Immigration Bureau to issue a notice to Qian Xuesen on August 4, saying that he could return to China.

When Qian Xuesen received this notice, he cried with joy, but soon realized one thing, that is, the pace of returning to China should be sooner rather than later, otherwise there would be changes if it drags on. So one month later, he took his wife and children on the "President of Cleveland" passenger ship on September 17 and embarked on the road to returning to China. On the way to

, the "President Cleveland" had stayed in Japan, Philippines and other places. Many people returning to China got off the boat to relax, but Qian Xuesen did not dare to leave at all, for fear that if he left the ship under the jurisdiction of the United States might be assassinated.

This is not because Qian Xuesen is timid, but because there are countless examples of this. Furthermore, Qian Xuesen's life at this time no longer belongs to him personally, but to his motherland and his family. He must protect himself.

On the morning of October 8, the "President of Cleveland" came to Hong Kong. After Qian Xuesen and his family got off the ship, they quickly moved from Hong Kong to Shenzhen. The long journey of return came to an end here.

When Qian Xuesen returned to China, especially after making great contributions to China's national defense, Americans regretted it. Daniel, who was embarrassed by Qian Xuesen, said sadly: "Let Qian Xuesen return to China is the stupidest thing the United States has ever done!" The sentence

later gradually evolved into the famous saying "Qian Xuesen can match 5 American teachers"!

Conclusion:

Many people don’t understand. Since Qian Xuesen is so powerful, why would Americans let him come back? Here we mainly talk about two points:

1. Americans believe that Qian Xuesen is worthless.

Since letting Qian Xuesen leave the confidential project and torture him, Americans think he is no longer as strict as before, so their care for him is no longer as strict as before. Furthermore, in the years when Qian Xuesen was isolated and excluded, the development of science and technology in the United States has made rapid progress. They believe that some of Qian Xuesen's theories have become outdated, so they no longer value him and do not care so much about his stay or stay.

Facts have proved that this idea in the United States is wrong, and they finally regret their conceit.

2. Based on the first point, the United States has taken into account the actual and current interests, that is, it is not easy to train a pilot, and they have more practical significance to the United States.

After all, it is the bargaining chips proposed by China are too tempting!

Since Zhou Enlai increased his bargaining chips and decided to release 11 pilots, it has had a huge temptation to the US government, so they agreed to the exchange.