Li Wang boxing book is recommended, but Li Er is not recommended. In fact, you can compare the real questions of Li Er and the postgraduate entrance examination in 1980s and 1990s. Some of Li Er's problems stem from this, and the problems are old and disordered. It is true that it is helpful for you to do Li Er three times, but it is really unnecessary to chew Li Er. You can go with Wang 18 when you have time. It can be said that the effect is better. Why do so many people recommend Li Er? Because before 20 14, there was basically only one Li Quanshu, and there were not many books on the market that could compete with Li Li, so students didn't have many choices. Li Wangquan's book layout is more reasonable, closer to the direction of postgraduate entrance examination, and Li Wangquan's book is more in-depth, and every question involved in it has been screened by these proposition experts, such as Wang Shian and Ji Wenduo, who are all mathematics proposition experts for postgraduate entrance examination. Presumably, they also had exchanges when writing this book, and their grasp of the proposition trend was also in place.