About math review: 1, classic textbooks (recommended calculus in higher education, probability theory and mathematical statistics in Zhejiang University, linear algebra in Tongji Edition), especially the deduction and thinking of theorems are very important, such as the proof of Lagrange theorem this year; 2. Counseling materials: knowledge points combine many real questions, but I think this book is mainly used as an examination outline, and its role is not particularly great. I feel that the formula induction of reading guidance books is not the same as that of reading textbooks. Many people can't see how Lagrange's theorem is proved when they read the tutorial books, but only know how to prove other conclusions with this theorem. Therefore, bookstores such as Li Yongle's review encyclopedia, Chen Wendeng's review guide, and Chen Dianyou's review guide for postgraduate mathematics (edited by teachers of Jida University and published by Tsinghua University Publishing House) can do it, mainly depending on which style you like. Personally, I feel that Li's foundation is easy to understand, but the answers to the exercises are relatively complete; It is difficult to publish, and it is equipped with a CD, but it feels very troublesome; Temple friends are relatively complete, regardless of science and engineering and economics, so there are knowledge points of mathematics from one to four and examples of real problems over the years. The disadvantage is that the answer after class is only a simple answer, not as complete as Li's. 3. Over the years, real questions and simulation questions: Li Yongle's real questions and classic 400 questions. I think these two books are very good, of course, the latter is more difficult, especially the first few episodes, which are very frustrating, but just stick to it. People with poor foundation suggest doing more real questions or several sets of exercises with 400 questions, but you must make sure that you understand the knowledge points every time you do a set. I have also seen other researchers use other simulation questions. It is said that they are all similar, so I dare not recommend them casually. After all, I have never used it.