Wang Bin spoke very well in the math contest. Wang Bin is very enthusiastic, logical and clear-headed when giving lectures, and can deeply understand and analyze topics. At the lecture site, he also gave a detailed explanation from the aspects of competition details, reading habits and improving learning quality in combination with his own experience and learning experience. Wang Bin, the gold medal winner of the 43rd International Olympic Mathematics Competition, is a doctor of Peking University Institute of Mathematics, and now works in the Institute of Mathematics and System Science of China Academy of Sciences.