Personally, I think math needs a review book, which is divided into Chen Wendeng's and Li Yongle's (one book is enough). I recommend Li Yongle's, Chen Wendeng's, Li Yongle's easy to understand and complete. Then you need a copy of Li Yongle's 660 Questions, which contains 400 options and 260 fill-in-the-blank questions. The training of these two questions is more comprehensive, and you can master more answering skills. Finally, I need a book with real questions and detailed explanations over the years. With these three books, the test 120 is no problem. If you have higher aspirations, you can try Li Yongle's Transcendence 135. But Li Yongle's 400 questions are not recommended. The title of that one is relatively biased, so the postgraduate entrance examination will not come out. If you are willing to work hard, you will be fine.