I'm not a candidate from Jiangsu and Zhejiang provinces. I compete in mathematics and physics in high school. The experience is that it is certainly helpful to hold a competition with a solid foundation, but it will definitely take a lot of time, and the premise must be that the foundation is solid and the basic points cannot be lost, according to personal hobbies and ability levels. The pressure in Jiangsu and Zhejiang should be greater, and the competition under systematic study is still beneficial. Moreover, when you go to college, you will find that thinking is much more important than doing problems. You can look at college textbooks according to a certain kind of questions, and you will find that many college entrance examination competitions are simplification of a ready-made knowledge point in universities. Talking outside the point, I feel nothing after the college entrance examination, mainly because I have mastered the knowledge level, put forward higher requirements for the study of various subjects, and can get high marks, laying a solid foundation for university study and community work.