1933, Qian Xuesen was in the third grade of Mechanical Department of Jiaotong University, and Professor Jin Yan taught hydraulics. On June 23, the hydraulics exam. According to the regulations of Jiaotong University at that time, after the exam, the teacher marked "√" or "×" on the test paper with a red pen, and then distributed it to the students in the next class, so that they could see which questions were answered correctly and which questions were answered incorrectly. The test paper is returned to the teacher, and the teacher writes the score in red pen in the score column in the upper right corner of the test paper.
Qian Xuesen looked at Jin Yunfa's test paper and scored "√", which means he got 100 this time. But when Qian Xuesen looked carefully, he found a small mistake: in the last step of a formula derivation, "Ns" was written as "N". So Qian Xuesen immediately raised his hand, explained his mistake and took the initiative to ask the teacher to deduct points. Professor Jin Yan saw that this was true, so he gave Qian Xuesen 96 points. Qian Xuesen volunteered to deduct points, which deeply touched Jin Yan. He admired the honest student very much and kept Qian Xuesen's test paper.
Qian Xuesen's introduction
Qian Xuesen (English: Qian Xuesen, 1 91year1February-20091day) was born in Shanghai, and his native place is Hangzhou, Zhejiang, China. He is a famous national scientist with outstanding contributions at home and abroad, the founder of China's space industry, a senior academician of China Academy of Sciences and China Academy of Engineering, the vice chairman of the 6th, 7th and 8th Chinese People's Political Consultative Conference, and the winner of two bombs and one satellite meritorious medal.
Qian Xuesen studied in department of mechanical engineering, national chiao tung university from 1929 to 1934; 1939 received a doctorate in aviation and mathematics from California Institute of Technology. 65438-0947 Professor of MIT; 1956 director, institute of mechanics, Chinese academy of sciences; 1957 was elected as an academician of China Academy of Sciences.