Shanxiang is the earliest teacher in China, with the most comprehensive books and the most detailed knowledge points. The disadvantage is that although the cover is different, Shanxiang's books are the same all over the country. Simply put, they are lazy and don't adjust their textbooks according to the local exam situation, so many things in the book are likely to be explained otherwise or not tested.

The illustrated books are also very detailed, although not as good as Shanxiang, and the knowledge points are also very comprehensive. Moreover, what is stronger than Shanxiang is that he will customize the teaching materials separately according to the examination situation in various places, so the practicality of the teaching materials is actually higher than Shanxiang.

Zhonggong's book can be said to be the least detailed among these families, but its advantage is that the test sites are outstanding and the methods and skills are well summarized. If you don't have enough time to review for the exam, Zhonggong's book is definitely your best choice, because it will help you find your way in a short time.