Textbooks are average. Postgraduate entrance examination generally uses some authoritative review materials. It is suggested that Chen Wendeng and Li Yongle buy one each. They have their own advantages and disadvantages. Chen Wendeng's summary is better, and Li Yongle's high number part is too much, but algebra, probability theory and mathematical statistics are ok. I just made two, and I can learn a lot by comparing them.

It's hard to get the basics (the second textbook). If you want something difficult, buy it. I have used it myself (the second textbook), and it feels good, because the foundation of the college entrance examination is the most important, and I am not afraid of anything when I have a good foundation! ! !