There is no scientific research, no competition, and no project suitable for 985 undergraduate students to be admitted to Peking University Soft Micro 20 Computer. 985 mechanical major students, there is no competition, scientific research and projects during the undergraduate period, only C++ is a computer-related professional course. Because I played in the past during my undergraduate course, it is difficult to have a complete learning state. Probability theory, high number and line generation are all within 80, and level 6 is within 500. Finally, in 2020, I took the postgraduate entrance examination, math 120+, specialized courses 1 10+, English 70+, politics 60+, initial test 360+ and retest 80+. Peking University Yao Ban Class and Zhiban Class, founded in Tsinghua by Yao Qizhi, an academician of China Academy of Sciences and a Turing Prize winner, include many top candidates in the provincial college entrance examination.