Because the logic of the basic course explanation is very confusing, a bunch of definitions are released without explanation, and low-frequency test sites are also various jumps. The whole lecture was without guidance and thought, and 90% people without foundation felt uncomfortable listening.

Wang Shian, 1987-200 1, was the head of the mathematics proposition group of the national postgraduate entrance examination and a senior expert of the mathematics proposition group of the postgraduate entrance examination of the Ministry of Education.

Former Dean of Graduate School of Beijing Institute of Technology, Dean and Professor of Applied Mathematics Department, mathematics expert enjoying special allowance from the State Council, visiting professor at Columbia University, University of South Florida and new york University.

Wang Shian did not elaborate on probability theory, such as classical probability, the formula of total probability and his definition.