I am a college student now. . . I said that the relationship between class and competition is not particularly close. That thing doesn't mean you can take part in the competition if you have a good foundation in chemistry. Basically, it's completely new. Your good foundation can only prove your strong learning ability. I advise you not to hold the competition, it's a little late. I remember that I only got 20 in the joint entrance examination of five schools in Tsinghua because I had never competed, but I also got 662 in the college entrance examination and 283 in the comprehensive examination.