2. 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, 50 participating universities, 20-25 universities, 50-60% and 60-70% respectively. Class C major belongs to the "lower-middle major" among the participating majors.