The knowledge in the first book is mainly Pythagorean theorem, real numbers, functions and so on. The knowledge in the second volume is mainly about the judgment of triangles, the properties of triangles, linear inequalities (groups), graphic translation and factorization.

Gao Jun, a senior teacher of Wentong Middle School in Jiujiang City, is a member of the compilation group of junior high school mathematics textbooks in the Mathematics Studio of Beijing Normal University, Ministry of Education.