Tian teacher is very dedicated, and most students respect him. Of course, no one can satisfy everyone. Tian teacher is a kind person, but the background of studying abroad affects the way he gets along with students. It is the duty of every doctoral supervisor to be strict with students. Whether it is torture or exercise depends on whether the students' mentality is normal. On the one hand, tian teacher will urge students to make progress; On the other hand, he doesn't eat and drink with students on weekdays, so the relationship seems unfamiliar. However, when any classmate is in trouble, he will step forward to help and protect his classmates. Nowadays, many people have a giant baby mentality, and it is ridiculous not to find fault with themselves when things happen.