The discipline evaluation of the Ministry of Education is the official authoritative basis for evaluating the discipline strength. Subject evaluation is conducted every four years, and the latest one is the fourth round. The evaluation results are divided into three categories: A, B and C, and each category is divided into three grades. Among them, Class C is divided into three grades: C+, C and C-. C+ ranks 40-50% among all participating universities, that is, there are 50 participating universities, 20-25 universities, 50-60% and 60-70%. Secondary major? .