Yes, junior high school math is not very difficult. In a month's time, besides eating, sleeping and resting, there should be 6~8 hours to study junior high school mathematics every day. There are not many knowledge points, just some functions (quadratic function, inverse proportional function, the nature of linear function), graphics (proving triangle congruence, proving quadrilateral, etc. And about circle), angular bisector theorem, Vieta theorem, etc. Of course, if you teach yourself, you'd better do a few examples. Forget the final exam. If you have a particularly strong ability, you can. If you don't know how to keep asking. Finally, one semester of high school knowledge is more than three years of junior high school knowledge. In fact, junior high school knowledge is not logical. Many students who don't work hard at ordinary times cram for the entrance exam and still do well in the exam. Well, that's all I know.