It is best to use the latest counseling materials. Mathematics for postgraduate entrance examination is different from mathematics for college entrance examination, and the types of mathematics for postgraduate entrance examination change greatly every year. Therefore, in order to be familiar with the postgraduate entrance examination questions, it is best to use the latest counseling materials to avoid the great difference between the content of painstaking review and the content of the examination (for example, in previous years, only multiple-choice questions were given in the last year, and knowledge points that were not paid much attention to by other parts were replaced).