Because we all know that talking loudly in the library affects others, which in itself is an interruption to others. But this female professor doesn't know such a problem that all students know. In a university in Hubei, a female professor made a loud phone call in the library, which interfered with other students' study. At this time, a boy patted the teacher and then made a little gesture to her.
Unexpectedly, such a reminder caused the teacher's anger. Facing the reminded students, the female professor was not ashamed at all, but insulted them and said many ugly words. Some students were very angry when they saw the female professor's reaction. They think that teachers, as teachers, can't set an example. Instead of apologizing to those who point out their problems, they insult them.
In my opinion, the female professor's behavior is so extreme because she feels that her professor's dignity has been provoked. Maybe for her, she thinks she is a professor, which is very high compared with students. Therefore, the students ignored her majesty by reminding her of her behavior. In her opinion, as a professor, she can do anything in the library. Even if the noise disturbs other students, because she is a professor, other students should or must tolerate her.