Mathematics classes are divided into different categories. Many classes use the second edition series of college mathematics textbooks edited by Xiao Shutie. There are the following books: Calculus for Freshmen, Multivariate Calculus and Its Application, Algebra and Geometry. Sophomore students study stochastic mathematics (or probability theory and mathematical statistics).

Besides, I also study discrete mathematics and complex variable function (or complex analysis).

Tsinghua University's computer series textbooks "Mathematical Logic and Set Theory" and "Graph Theory and Algebraic Structure" are used for discretization. Complex variable function is a complex variable function in engineering mathematics compiled by Xi Jiaotong University.

Textbooks may change every year, and that's what I learned.