I'm just a freshman this year, majoring in mathematics. I participated in the 2009 National Senior High School Mathematics League. 10 and China Physics Olympic Games suggest that you apply for both mathematics and physics, because all the requirements in the mathematics competition are out of the outline, and the mathematics competition can greatly develop your thinking. Moreover, after winning the first and second prizes in the province, you can get extra points in the college entrance examination, enroll students independently, and even get the qualification to file. It depends on your own abilities and interests. If you apply for physics, many topics in the Chinese Physics Olympic Games use differential integral and advanced mathematical skills. It can be said that most of the winners of many physics competitions are experts in mathematics, and their results in physics and mathematics are very good. Mathematics and physics can complement each other, so I suggest you sign up for the training class, and the sooner you start, the better.