Buy some reference books for the math contest during the summer vacation. If you don't do special training, it is difficult to get good grades. You will know that you are the victim of exam-oriented education. Try two, try the difficulty and

Shanghai Mathematics Amateur School (qualified for the National Senior High School Mathematics League after being admitted). It also provides elite education for social training. Generally, there are better training courses in summer vacation, such as Tianjin, Hangzhou and Wuhan, aiming at the national high school mathematics league.