Although everyone in the university has received higher education and basic moral qualities, there are all kinds of birds when the Woods are big. He always has one or two people with low moral quality, which you will often meet in society. So, just keep your distance from such people. On the surface, proper work still needs to be done, that is, to meet and say hello and maintain proper relations. However, if there is a direct conflict, then you should ignore him. You should have an appropriate counterattack, but don't always be serious with him, because you have always been serious with him, and he will only think that you care about it. On the contrary, it will always stick to you and affect your normal work and life, or let him know the pain without resisting.