Fireworks can't be cut. Originally named Li Yin, male, he was admitted to the Physics Department of Nanjing Normal University in 2007, then transferred to the Mathematics Department of Grade 08, and entered the Mathematics Department of the Chinese University of Hong Kong on 20/0/2, where he studied under Naizhong Conanliang. He has published many excellent (professional) popular science articles in mathematics and physics on Douban, which are deeply liked by a large number of science men and women. At the same time, it has also been criticized by some small people.