Zhang Yu 18, who was used for the second round of review of mathematics for postgraduate entrance examination, talked about Zhang Yu's video and felt that the video did not match the book. How to use it better? From now on, you should read the textbook first. Zhang Yu's video is also good. If the foundation is not good, you can go to a basic class. But the textbook should be finished. After the textbook passes quickly, you can start to do 36 lectures. 36 cases are still very classic, but there is not much practice. Try to finish it and brush a thousand questions. Then the basic course, he tells you the concept, and then the intensive course, all about, the textbook is 36 lectures. After the lecture, you will be assigned questions. Is there any problem?