Yang Chao is a member of teacher Zhang Yu's team and the founder of Happy Mathematics. Yang Chao once co-authored Eighteen Lectures on Advanced Mathematics with Zhang Yu. Zhang Yu and Yang Chao are both famous teachers for postgraduate counseling.

Zhang Yu's Lecture on Advanced Mathematics 18 is a book published by Zhang Yu in beijing institute of technology press on June 0, 20 16. This book is divided into 18 lectures according to the knowledge points frequently tested in the syllabus, and the contents of this book are independently written by teacher Zhang Yu, so the title is "Zhang Yu Advanced Mathematics 18 lectures", and each lecture is divided into four modules: the requirements of the syllabus, detailed lectures, detailed answers to examples and refined exercises.