Li Yongle's guidance on real questions is classified according to the types that appear every year, and the pages of answers are written at the back of each question. Please read them carefully. They are all complete, so there will be no answer.

At present, Li Yongle's postgraduate mathematics is quite good. Teacher Li Yongle is a master tutor in the Department of Mathematics of Tsinghua University. His explanation of postgraduate mathematics is simple and straightforward, which helps candidates find their weak points quickly, and uses teachers to train a large number of high-scoring candidates every year. Many candidates have obtained graduate degrees because of him.

Teacher Li Yongle used to be the proposer of postgraduate mathematics, and Tsinghua University taught linear algebra. After decades of word-of-mouth, he taught seriously and was liked by the majority of postgraduate students. It's no problem to choose Mr. Li Yongle for the postgraduate entrance examination.