It is difficult. Zhang Yu 1000 The math problems in the postgraduate entrance examination belong to the high difficulty level, and the problems inside are all ABC three groups, and the difficulty is gradually increasing. Some topics are too difficult to belong to the type of postgraduate mathematics, but to the type of competition mathematics or postgraduate mathematics department. Zhang Yu, a graduate math teacher in Qi Hang Graduate School, is the author of Advanced Mathematics for Postgraduates 18 Lecture and Classic Questions on the Origin of Postgraduates' Mathematics 1000. He has been engaged in advanced mathematics teaching and postgraduate counseling for many years.