Three. According to the query of official website, Tsinghua University, the mathematics classes are divided into: undergraduate training plan class of mathematics and applied mathematics, mathematics training plan class of Tsinghua University, and mathematics talent training plan class of Qiu Chengtong. Tsinghua University (hereinafter referred to as "Tsinghua"), located in Haidian District, Beijing, is a national key university directly under the Ministry of Education of People's Republic of China (PRC), ranking among the national "double-class", "985 Project" and "21project".