The number two in the postgraduate entrance examination does not involve probability theory and mathematical statistics, and the examination mainly includes two parts: advanced mathematics and linear algebra. Among them, advanced mathematics accounts for 78%, including function, limit, continuity, differential calculus of univariate function, integral calculus of univariate function, calculus of multivariate function and ordinary differential equation. Linear algebra accounts for 22%, including determinant, matrix, vector, linear equations, eigenvalue and eigenvector of matrix, quadratic form and so on.