1, Li Siguang is one of the pioneers of China geology, founded geomechanics, and made important contributions to the development of China petroleum industry.

2. In his early years, he made exquisite research on the significance of Odonata fossils and their stratigraphic stratification. It is suggested that there are Quaternary glaciers in eastern China. This paper studies the crustal movement and its relationship with mineral distribution from the mechanical point of view, and establishes new concepts of geomechanics and tectonic system.

3. Throughout his life, he advocated studying the occurrence, development and combination of geological structures from the perspective of mechanics, believing that various structural features are the result of in-situ stress activities, establishing the concept of "structural system" and establishing geomechanics school.

Extended data:

Li Siguang's anecdote.

1, name source

Li Siguang comes from a poor family. Because Li Siguang is the second child, his father Li Zhuohou gave him a famous name: Li Zhongmai. From 65438 to 0902, under the leadership of Zhang Zhidong, the leader of Westernization School and governor of Huguang, Hubei began to build a large number of new primary and secondary schools, teaching students not only traditional classics, but also scientific and technological knowledge.

The news soon spread to Huanggang, and Zhong Yi was anxious to go to Wuchang and fill in the registration form in Hubei Academic Affairs Office. Maybe he is too nervous. He mistakenly wrote his age "fourteen" in the name column. After discovering the mistake, he was reluctant to spend money to buy another form because his family was poor. He was puzzled. He looked up and saw the words "just four watches" on the horizontal plaque hanging in the middle of the front hall.

Zhong Yan's eyes lit up. He added a few strokes of "Li" to "10" in the name column, and added the word "light" after "four". After correction, he said with satisfaction: "Four lights, bright on all sides, and the future is boundless." From then on, he changed his name to Li Siguang.

2. Music contribution

Li Siguang is not only a geologist, but also a music lover. He composed the earliest violin music "Difficult to Walk" in China.

Ma, a researcher at the Institute of Geomechanics of the Chinese Academy of Geological Sciences, said that Li Siguang became fascinated with the violin when he was studying in Britain. Li Siguang studied hard in England for seven years, and wrote the violin Hard to Walk before returning to China from 65438 to 0920. According to the research of Modern Music Room of Shanghai Conservatory of Music, this is the earliest violin music with music score as evidence in China.

Baidu Encyclopedia-Li Siguang