Which scientists in China were prevented by the United States from returning to China to contribute to the country?

Qian Xuesen, a native of Shanghai, was born in Lin 'an, Hangzhou, Zhejiang. World-renowned scientist, aerodynamicist, founder of manned space flight in China, academician of China Academy of Sciences and China Academy of Engineering, and winner of China's two bombs and one satellite meritorious medal, he is known as "the father of China's space flight", "the father of China's missiles", "the father of China's automatic control" and "the king of rockets". The launch of China missiles and atomic bombs was advanced by at least 20 years due to Qian Xuesen's return to China.

1934, graduated from national chiao tung university Institute of Mechanical and Power Engineering, and was once a professor at Massachusetts Institute of Technology and California Institute of Technology. Thanks to the efforts of President Mao Zedong and Premier Zhou Enlai, he returned to China. From 65438 to 0959, he joined the China * * * Production Party, and successively served as the director of the Department of Modern Mechanics of the University of Science and Technology of China and the director of the Institute of Mechanics of the Chinese Academy of Sciences.

1950, when Qian Xuesen went to the port to prepare for returning home, he was stopped by American officials and put into prison. At that time, dani Dan A. Kimball, the deputy secretary of the US Navy, claimed that Qian Xuesen was worth five divisions wherever he went. From then on, Qian Xuesen was persecuted by the American government and lost his precious freedom. He lost about 30 pounds in a month. Immigration raided his home and detained him in Temina Island for 65,438+04 days. He was not released until he received a huge bail of $65,438+$5,000 from California Institute of Technology. Later, the customs confiscated his luggage, including 800 kilograms of books and notebooks. He didn't prove his innocence until the American prosecutor reviewed all his materials again.

The news that Qian Xuesen was persecuted in the United States soon spread to China, and friends in China's scientific and technological circles supported Qian Xuesen through various channels. The Central Committee of the Communist Party of China is extremely concerned about Qian Xuesen's situation in the United States, and the China government publicly issued a statement condemning the US government for imprisoning Qian Xuesen against his will.