As for the tutorial books, have you attended the tutorial classes in Du Wen? It would be great if I didn't take other math textbooks. Besides, how many did you take? There are recognized good textbooks at every level:) You can also use others. There is no need to specify Chen Wendeng's mathematics. Isn't that great? I suggest you look at the following details.
Wendeng Chen's "Review Guide" has a high number, and there are some mistakes. Li Yongle's review book is very strong in linear algebra. These two books are the same price, 49.80 yuan. It is strongly recommended that two people review the postgraduate entrance examination together. These two books are bought separately and read each other. In addition, it is recommended to use Li Yongle's books, such as the analysis of exam questions over the years, 400 classic questions in full simulation, and the breakthrough 135.
Good luck:) Of course, you'd better sign up for a class:)