It's hard to compete at the top. The pinnacle of junior high school mathematics, this teaching aid is relatively suitable for students with above-average grades. The content of the test questions in the supplementary materials tends to expand training and has strong analogy. If you don't have a good digital foundation, you will find it difficult to do the questions inside. Many questions in this teaching aid are real questions of famous schools. When solving a problem, we must pay attention to the method of solving it.