Huazhong cup does not check the weight. Huazhong Cup is a mathematical modeling challenge for college students. The content of the competition is mathematical modeling, and mathematical modeling does not involve the content that needs to be checked. The competition requires that the entries should not be copied. The contest is sponsored by Hubei Institute of Industrial and Applied Mathematics, and the organizing committee of "Huazhong Cup" Mathematical Modeling Challenge for College Students is responsible for the annual registration, award presentation and certificate printing.