As for the self-taught institutions, according to experience, the training institutions are similar, and the institutions mainly take classes, do problems and mark test sites. The key is to rely on your own learning. Correct attitude. Self-taught exams are not difficult.

As long as it is an exam, it is difficult. As long as you study hard, make up your mind, read books, and do real questions reasonably, many people will be admitted every year. If you have the conditions, you can sign up for a class, have a teacher's guidance, and circle the test sites.