Tsinghua, Peking University and Fudan University. If you take the self-taught undergraduate course, the mathematics major is a compulsory major in key universities, among which Tsinghua, Peking University, Fudan University and other key schools all need to take the mathematics major when taking the self-taught undergraduate course. Self-taught undergraduate course is the abbreviation of self-taught undergraduate course in higher education and one of the basic systems of higher education in China.