He is a clinical medicine teacher, and his teaching method is questioning teaching. He can make students doubt life. It is his teaching characteristic to be eliminated late and be punished immediately for a foul. The mantra is: deduct points according to regulations, and add points to see the mood. The title of "devil professor" came from this.
Let me give you a general spoiler!
He confronted Hua Yilong, the "bottom scum" who was admitted to medical school by "perspective eyes" in the play, and agreed with each other. During this period, there were many fragments of Hua Yilong, the scum of the school, who was added to the city by poison tongue, which added a lot of laughter to the sharp increase.
Duan Tiancheng's brain tumor has been affecting him. When he announced the elimination of students, he fell down, and then Hua Yilong and a group of partners operated on him, and the operation was successful. After waking up, he confessed to Angie in a joking way, and Angie agreed. After the operation, he had a girlfriend, which was the best of both worlds. The scene in which Duan Tiancheng and Angie love each other also adds a lot of color to this drama.