Chen Jixiu is a postgraduate book in many colleges and universities. The arrangement is similar to Fudan edition. The key is that there are many examples in it, which are easy to learn, and there are many examples of mathematical application, but there are fewer exercises. Ouyang Guang's arrangement is different from Chen Jixiu's. Relevant knowledge will be taught together, and there are not many application examples, but it is convenient for self-study. Both are classic textbooks, and Ouyang Guang's is rarely used in colleges and universities now.