During this time, I read the book Crossing the Horizon, which said: Grandpa Li Siguang gave us a detailed explanation from the surface of the earth to the inside of the earth, which made me feel the fantasy of the universe.

Among them, what impressed me most was that the average thickness of red mud was less than 300 meters. Almost all of them are composed of basalt, that is to say, there is no silicon-aluminum layer, but in some sea areas of the Indian Ocean, a very thin silicon-aluminum layer is found, which is mainly composed of silicon-aluminum layer. This passage tells the origin of red mud.

We should learn from Grandpa Li Siguang's spirit of being brave in practice and exploration. So, I want to study hard and study hard!