Qian Xuesen's Work in America

In the United States, Qian Xuesen is recognized as one of the authoritative scholars in mechanics and applied mathematics. He has published important academic papers on rocket and other jet propulsion theories, elasticity, compressible gas dynamics, rarefied gas dynamics, combustion problems and general automatic control theory. 1950 In August, Qian Xuesen booked a plane ticket to leave the United States for home, but the US Immigration Bureau prohibited him from leaving the country and detained all his scientific books and research notes. In early September, the US Immigration Bureau detained him 15 days on charges that he was a "producer of * * *" and attempted to smuggle confidential scientific documents back to China. During his detention, he was forbidden to contact with outsiders and was physically and mentally devastated. Later, he was released on bail by California Institute of Technology for $654.38+$5,000, but he was instructed not to leave Los Angeles and was often monitored and harassed by agents. In the past five years, Qian Xuesen missed his motherland and relatives day and night and was always ready to return to China. This day finally came. On August 4th, 1955, he was allowed to leave the United States. On September 17, Qian Xuesen left the United States from anxious to return, took his wife Jiang Ying, two children and more than 20 overseas students from China by the mail ship "President Cliff", and returned home via Hong Kong. 65438+ arrived in Guangzhou on18 October, and was warmly welcomed by the people of the motherland and the scientific community. In Shanghai, he was reunited with his long-lost family, and his 74-year-old father specially gave him a set of reproduced "Famous Paintings of China in Past Dynasties". 10 year 10 On October 28th, Qian Xuesen arrived in Beijing. The next day, he took his wife and children to watch the Tiananmen Square in Beijing, which they had been longing for for for a long time. After more than a month of sightseeing after returning home, Qian Xuesen witnessed the achievements of socialist construction in the motherland and saw the hope of the motherland. He accepted the invitation of the Chinese Academy of Sciences, presided over and led the research work in mechanics of the Chinese Academy of Sciences, and used his talents to serve the motherland.