Chengdu Haug Mathematics Classroom is in the network classroom. According to relevant data, Dr. Peking University, the editor-in-chief of the series Blue Book of Postgraduate Mathematics published by Higher Education Press, has been engaged in scientific research in the fields of applied mathematics and basic mathematics for more than ten years. Editor-in-Chief of Blue Book Series of Mathematics Textbooks for Postgraduate Entrance Examination by Higher Education Press, has more than ten years of research and teaching experience in the fields of applied mathematics and basic mathematics.