A math book I read when I was a child was called "Hua's School Mathematics Textbook". Peking University students began to be fascinated by mathematics because they read a Chinese school math textbook in the first grade of primary school. It can be said that he began to understand and became interested in mathematics. Shen Wei's full name is Wei Dongyi. 199 1 Jinan, Shandong, Dongyang, Zhejiang. Peking University, Assistant Professor, Research Fellow, Department of Differential Equations, Peking University Institute of Mathematical Sciences.