San Qian generally refers to Qian Xuesen, the father of China's space flight, the father of China's missiles, Qian Weichang, the father of China's modern mechanics, and Qian Sanqiang, the father of China's atomic bomb. 1956 formulated and planned the first scientific plan of China.

Qian Xuesen, Qian Weichang and Qian Sanqiang were also called "San Qian", which was initially called "nicknames" by President Mao Zedong and later called "San Qian" by Premier Zhou Enlai in China's scientific and technological circles. "San Qian" is an outstanding figure in China's scientific community and a top scientist in the world.

In addition, among the 23 scientific and technological experts who won the "Two Bombs and One Satellite Meritorious Medal", there is also the saying of "San Qian", and "Two Bombs and One Satellite" refers to Qian Xuesen, Qian Ji and Qian Sanqiang. San Qian played an important role in the development of "two bombs and one satellite".

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San Qian's achievements.

Qian Sanqiang and his wife He are called "the Curie couple of China" by the west because he discovered a new method of nuclear fission when he was in France.

Qian Xuesen himself said. Zheng Zhemin, a famous mechanic and 86-year-old academician of China Academy of Sciences and China Academy of Engineering, told China Youth Daily that Qian Xuesen came to Tsinghua to give lectures on 1947. One day, Zheng Zhemin went to Qian Weichang's house and saw Qian Xuesen present. He ran back and said, "I feel embarrassed to have important people at home." .

Qian Weichang has a very general theory, which describes different stages of shell deformation. Everyone knows that this field is very influential internationally. The scientific research achievements of mechanics and applied mathematics named after Qian Weichang in the world include Qian Weichang equation, Qian Weichang method and Qian Weichang general equation.

As a giant in the field of science in China, scientific research achievements are only a part of many legacies left by San Qian.

After San Qian's return to China, it was not smooth sailing. In that special era, they were more or less hit by stormy waves. Qian Weichang became the famous Great Rightist in that era.

Baidu Encyclopedia-San Qian