Li Yongle's 300 questions are very difficult. Personally, it is more difficult than Chen Wendeng's exercise book. As for counseling books, if you have enough time, you can read both of them well. Chen Wendeng's method can help a lot in the exam, while Li Yongle pays attention to the basics and can sweep away all aspects that may be missed in peacetime.
In addition, I just took the postgraduate exam this year, with a total score of 362. I took the math exam for the first time 1 16. I have read both books and feel very helpful. Li Yongle helped me lay the foundation, and Chen Wendeng's method was more effective.