Zhao Jiuzhang, a famous geophysicist, described geophysics like this: "Above, he searched the green void, and below, there were two places in the yellow, and there was no trace".

Yin Hongfu, former president of China Geo University: "As a geologist, I feel happy and proud to serve my motherland all my life."

Li Siguang's famous saying

I am a descendant of the Chinese people, so I naturally want to dedicate all my knowledge to my dear motherland.

The true scientific spirit should be cultivated from correct criticism and self-criticism. Real scientific achievements should stand the test of facts. With this double guarantee, we can do it with confidence and boldness, and we will not dig the trap of arrogance.

Science respects facts and cannot make up excuses to attach a theory.

Science is an honest thing, which is accumulated by the labor and wisdom of many people.

If you don't doubt, you can't see the truth, so I hope everyone will be skeptical and don't be carried away by the established theory.

Truth, even if it only sees a glimmer of light, can't make its glory dim.