This is a man who wants to be a generational hero like Du Yuesheng, but in fact he is just the son of a high school mathematics teacher, so he wants to do something with his "skills", so every time there is a fight in school from kindergarten to elementary school, junior high school, and high school, there will be a fight with him. He is the "boss" of a gang, which is a gang that does good things of "hoeing the strong and supporting the weak", but in fact he is just a school gangster who gives the teacher a lot of headaches. His name is Zhang Kai.