Modern Euclidean geometry-systematically discusses the knowledge related to plane geometry, but there is no such system in general textbooks-review and research of elementary mathematics-divides solid geometry into plane geometry-geometric properties of conic curves.

Introduction to Inequalities and Commonly Used Inequalities-In order to make students feel no difficulty in inequality, these two books, both at home and abroad, should be carefully studied.

-Although it is a college textbook, it is also a sharp weapon for us to talk about functions and inequalities in elementary mathematics. I think we should take an American analysis course, be more active and close to elementary mathematics.

"Academicians' Lectures on Mathematics"-Zhang Jingzhong. I only bought a book "Miscellaneous Talks on Mathematics", which is really good. I will definitely buy the rest if I have the chance.