1. From the question type, Wang Chaoxia's papers are not only diverse but also highly targeted, with strong foresight and scientific pertinence.

2. From the quality point of view, the overall quality of Wang Chaoxia's books is good, especially the examination papers. Most of the questions come from real questions from all over the world, and the editing quality is still ok, because the questions here represent the real questions you choose in the exam.