Mathematics is one of the postgraduate entrance examinations for mechanical major. If I have enough time, I recommend reading the Tongji version of Advanced Mathematics. Tsinghua University Juyuma Edition is a linear algebra view, but Juyuma Edition is more difficult, and Tongji Edition is also acceptable. Probability theory and mathematical statistics are naturally the flourishing edition of Higher Education Press. It's just that the exam time is very tight, so it may be unrealistic to read a book completely. It is suggested to focus on the whole book of mathematics. The difficulty of the whole book is that of Chen Wendeng. Personally, I feel that Li Yongle's is good and the difficulty is moderate. It is not difficult to get a 130.