It is much more difficult to take the entrance examination for advanced mathematics than to take the undergraduate course. It is no exaggeration to say that the high scores of the undergraduate entrance examination can be passed with your eyes closed, and the difficulty is not even as good as the final exam of the undergraduate entrance examination. However, the entrance examination is more difficult than the final exam of the undergraduate entrance examination.
Postgraduate entrance examination is an examination at the level of undergraduate graduation, aiming at eliminating people who are not suitable for this major. The undergraduate course belongs to the junior college level at most, and the difficulty is only slightly eliminated.