The effect is great. Li Yang's mathematics for postgraduate entrance examination is relatively basic, suitable for people with poor foundation, and the logic of lectures is clear, which can lay a solid foundation and play a great role in later learning. Postgraduate entrance examination is a selective examination that candidates must pass to become graduate students. Postgraduates are higher-level academic qualifications after junior college and undergraduate course, which are divided into master students and doctoral students. Generally speaking, "graduate students" usually refer to master students.