Tuhua and Zhonggong both review textbooks, but the emphasis of Tuhua and Zhonggong is slightly different; Painting pays more attention to routines, and it is faster to solve problems in a short time by painting. For example, there are some general mathematical formulas in the book of Theology, which can be directly used in the examination room to cope with the exam. Very organized, very useful for people who don't do well in exams or want to score quickly. Zhong Gong's books are a bit elegant, and personally feel that they are not practical, but how to choose textbooks depends on one's study habits and one's own situation.