From 65438 to 0943, Zheng Zhemin was admitted to the Department of Electrical Engineering in The National SouthWest Associated University with the first place in science and engineering, and changed to department of mechanical engineering the following year. He loves physics, is willing to answer questions for his classmates, and has also improved himself. After War of Resistance against Japanese Aggression's victory, the school moved back to Beiping (now Beijing), and Qian Weichang went to the Department of Mechanical Engineering to teach mechanical problems. His rigorous and vivid theoretical analysis aroused Zheng Zhemin's great interest, and he developed feelings for mechanics from then on. 1947 After graduation, he stayed in Tsinghua University as a teaching assistant of Qian Weichang, studying the perturbation method of money. On one occasion, he read the magazine Engineering Education brought back by Liu Xianzhou from the United States, which advocated changing the tradition of engineering education and making it scientific and technological. 1948 was admitted to the Rotary International Scholarship to study in the United States, and Qian Weichang and Li Jixiang introduced him to the California Institute of Technology to study mechanics. A year later, he successfully obtained a master's degree, and then became a doctoral student of Qian Xuesen, doing a paper on thermal stress. Fortunately, he often heard Qian Xuesen introduce his experience in scientific methods. In that famous university, he listened to lectures by famous professors such as G.W. Gauzner, W.D. Reina and A. Eldrie, and worked with Gauzner in earthquake resistance. When I studied Baynard's cell phenomenon with Benevolence, I realized the essence of dimensional analysis. He also had the opportunity to listen to the reports of masters such as T. Von Kaman, G. I. Taylor and J. Von Neumann. He experienced the essence of modern applied mechanics school represented by L plante-von Carmen-Qian Xuesen, whose essence is to make engineering based on modern science, focus on important practical problems, emphasize clear expression, rigorous analysis and innovative theories, and then open up new technologies and industries. 1952, Zheng Zhemin received his doctorate from this school.