Li Zhengdao was born in Shanghai. He likes reading since he was a child. He can't put down his books all day. He even took his book to the bathroom. Sometimes he doesn't bring toilet paper, but he never forgets them. During the Anti-Japanese War, he went to the southwest to study, and lost all his clothes along the way, but he didn't lose any books, and he lost more and more every time. 1946, 20-year-old Li Zhengdao went to the United States to study. He was only a sophomore at that time, but after a rigorous examination, he was admitted to the graduate school of the University of Chicago. Three years later, he passed the defense of his doctoral thesis with "special insights and achievements" and was known as "Dr. Child prodigy" at the age of 23. Li Zhengdao's outstanding contribution to modern physics is: 1956. In cooperation with Yang Zhenning, he deeply studied the puzzling mystery of θ-τ at that time and put forward the "Li Yiyang hypothesis", that is, parity may not be conserved in the weak interaction of elementary particles. Later, this hypothesis was confirmed by the experiment of Wu Jianxiong, a female physicist in China, thus overthrowing the law of parity conservation, which was regarded as the golden rule in the physics field in the past, and exploring the micro for mankind. He also won the 1957 Nobel Prize in Physics. This is the first time that a scientific work won the Nobel Prize in the second year after its publication. Prior to this, Li Zhengdao was the second youngest Nobel Prize winner in history. Other important works of Li Zhengdao include: 1949. In cooperation with M. Rosenblat and Yang Zhenning, he proposed the universal Fermi weak interaction and the existence of intermediate bosons. 195 1 points out that there is no turbulence in two-dimensional space in hydraulics. 1952 cooperated with D. Piness to study the structure of polaron in solid state physics. In the same year, he cooperated with Yang Zhenning to put forward Yang Zhenning-Li Zhengdao Theorem and Li Yang Monocycle Theorem about phase transition in statistical physics. 1954, the famous "Lie model" theory in quantum field theory was published. 1957 cooperated with R. Ohmae and Yang Zhenning to put forward the possible future of CP non-conservation and time non-inversion. In the same year, he cooperated with Yang Zhenning to put forward the two-component neutrino theory. 1959 cooperated with Yang Zhenning to study the molecular motion theory of hard-sphere Bose gas, which contributed to the study of superfluidity of ammonia ⅱ. In the same year, we cooperated to analyze the role of high-energy neutrinos and determined the direction of a large number of experiments and theoretical work in this field for more than 20 years. 1962 cooperated with Yang Zhenning to study the irreversibility of electromagnetic interaction of charged vector mesons. 1964 cooperated with M. Nauenber to study the problem that infrared divergence can be completely offset in the process of no (static) mass particles. This work is also called Lee-Naumburg Theorem, or combined with the work under Wood, it is called KLN Theorem. The field algebra theory was put forward in the late 1960s. In the early 1970s, the problem of CP spontaneous breaking was studied. Non-topological solitons are discovered and studied, and the soliton packet model theory of hadron structure is established. For the color limit phenomenon, the concept of vacuum "color dielectric constant" is also proposed. In the late 1970s and early 1980s, we continued to study path integration, lattice specification and time as a dynamic variable. Then the foundation of discrete mechanics was established.

Qian Xuesen (1911-) is a modern scientist in China. Originally from Hangzhou, Zhejiang, he was born in Shanghai. Studying in America, engaged in rocket research under the guidance of Carmen, the founder of modern mechanics. After returning to China, 65438-0955 devoted himself to the establishment of China's mechanics and space industry. Member of the Department of Mathematical Physics of China Academy of Sciences, researcher of the Institute of Mechanics, the first director, and the first director of the theoretical and applied mechanics Society of China. From 65438 to 0958, he served as the deputy director of the National Defense Science and Technology Committee of China People's Liberation Army, and did a lot of work for the scientific and technological development of our army.

He made pioneering contributions in many fields of mechanics. In aerodynamics, the similarity law of transonic flow is put forward, and the concept of hypersonic flow is put forward for the first time with Carmen, which provides a theoretical basis for aircraft to overcome thermal barrier and sound barrier in the early stage. Another example is the Carmen-Qian Xuesen formula used in the design of high subsonic aircraft. In the late 1930s, together with Carmen, he proposed a new nonlinear instability theory for spherical shells and cylindrical shells. After returning home, he advocated that the macroscopic mechanical properties of matter should be determined from the microscopic laws of matter, named it Physical Mechanics, compiled a monograph, Lectures on Physical Mechanics, and organized forces to carry out research. In terms of rocket and jet propulsion, he proposed and realized the use of rockets as boosters to shorten the take-off runway of aircraft, and did a series of pioneering work for long-range rocket propulsion. 1949, he first proposed the idea of a nuclear rocket. In the early 1950s, he established a new discipline "Control" in Wiener, which lasted for several years, and then quickly developed into a new technical science-"Engineering Cybernetics". He also advocated the establishment of "systematics" on the basis of Bergfeld's "general system theory". Therefore, he is not only an expert in mechanics and rockets, but also an advocate of many interdisciplinary and interdisciplinary disciplines, and put forward many new viewpoints on scientific system and scientific methodology.

In his early years, he published more than 50 important scientific papers in American journals such as Jet Propulsion and Journal of Mathematics and Physics.