Li Siguang was originally named Li Zhongmai. /kloc-at the age of 0/3, Li Zhongmai went to the West Lake New School. After buying the registration form, he made a mistake in his busy work. When he was fourteen, he filled in the name column by mistake and bought a registration form. Without money, he added a few strokes to the word "ten" and became his surname "Li"

Li Siguang has been engaged in paleontology, glaciology and geomechanics for a long time, and has made outstanding contributions in identifying Polypodiaceae fossils, discovering Quaternary glaciers in China and establishing geomechanics.

For a long time, the international community has been filled with the fallacy that there were no glaciers in the Quaternary in China. In order to prove that there are traces of Quaternary glaciers in China, Li Siguang traveled all over the country, visited the eastern foot of Taihang Mountain, Datong Basin, the Yangtze River Basin and visited Lushan Mountain several times. He found that a boulder in Guling West Valley stood on top of another boulder, and came to the conclusion that there were a large number of glacial remains in Lushan Mountain, and firmly believed that Lushan Mountain was "a typical area of Quaternary glaciers in China". After visiting Huangshan Mountain, Jiuhua Mountain and Tianmu Mountain, we found typical ice erosion landforms and glacial mud and gravel profiles ... 1936, Li Siguang found ice wear patterns in Huangshan Mountain and published Quaternary Glacier in Huangshan Mountain, Anhui Province. So far, the fallacy that there are no Quaternary glaciers in China is self-defeating.

Li Siguang's contribution in the history of science is nothing more than the establishment of geomechanics, a new frontier discipline. He is the author of the concept of geomechanics, and thinks that the rock deformation in crustal movement is the result of in-situ stress.

1in July, 947, he represented China in the 18 international geological congress, applied his own geomechanics theory for the first time, and made an academic report entitled "The Origin of Xinhua Xia Hai", which aroused strong repercussions. Since then, geomechanics, a new discipline founded by China people, has officially gone down in history.

As early as 1922, Professor Blake Wilde of Stanford University in the United States arbitrarily asserted: "China is a country lacking in oil resources." This mistake was not refuted by Li Siguang until the founding of New China. Li Siguang believes that the whole Neocathaysian system is a huge "polygonal" structural system with three uplift zones and three subsidence zones, which are separated from each other. Uplift with a variety of mineral deposits, subsidence with rich natural gas and oil. Under the guidance of Li Siguang Theory, China discovered oil in Daqing, Dagang, Shengli and North China successively, thus throwing the hat of "China's theory of being poor in oil" into the Pacific Ocean.