Qufu Normal University. "Teacher Tik Tok is crazy" is an online celebrity. His real name is Chen Gang, a native of Shandong, and he graduated from Qufu Normal University. He used to teach in Jining for many years, and later left the teaching post for some reasons. After that, he created a series of interesting short videos on Tik Tok platform, which became popular on the Internet with his humorous expression and unique teaching style, and was called "Teacher Tik Tok is crazy".