Difficult, worth buying. The math part of "Wang Chaoxia has both ability and political integrity" is more difficult. It is a book for advanced readers of mathematics, which may be difficult for ordinary readers to understand. At the same time, it provides many in-depth deductions and examples to help readers better understand the principles of mathematics, so if you are interested in mathematics, this book is still worth buying. Wang Chaoxia has both ability and political integrity, aiming to help readers better understand the principles and ideas of mathematics. This book, written by the famous mathematician Wang Chaoxia, is regarded as a mathematical classic.