Geologists in Li Siguang (1889- 197 1). Huanggang, Hubei. This word is a bit interesting. Join the league at an early age. Participated in the Revolution of 1911. 19 19 graduated from Birmingham university with a master's degree. 1920 Return to China. Professor Peking University, Director of Institute of Geology, Chinese Academy of Sciences. Engaged in the research and teaching of paleontology, glaciology and geomechanics. After the founding of People's Republic of China (PRC), he served as Vice President of China Academy of Sciences, Director of Institute of Paleontology of China Academy of Sciences, Minister of Geology Department, Member of Geology Department of China Academy of Sciences, Chairman of China Association for Science and Technology, and Vice Chairman of the Second to Fourth CPPCC. 1958, joined the China * * * production party. He is a member of the Ninth Central Committee of the Communist Party of China (CPC) and a representative of the First to the Third National People's Congress. Founder of geomechanics in China. It is advocated to study the crustal phenomenon by mechanical methods, explore the laws of crustal movement and mineral distribution, and regard various structural features as the results of in-situ stress activities, thus establishing the basic theory of "tectonic system". Based on this theory, the geological structural characteristics of eastern China are analyzed, and it is considered that there are large reservoirs in the three subsidence zones of the Neocathaysian structural system. In seismic geological work, it is advocated to observe the change of in-situ stress on the basis of studying geological tectonic activities, which points out the direction for realizing earthquake prediction. He is the author of Geology of China, Introduction to Geomechanics, Seismogeology, Astronomy, Geology and Paleontology.