Do I have to wear formal clothes when interviewing for a job on campus?

All those who don't need it are students You don't need to dress too formally, just clean and tidy. Interviewers also vary from person to person. Wearing a formal suit may add or subtract points, depending on what they think. Write a resume carefully, concisely, methodically and at a glance. The main thing is to watch the play, one is my own ability, and the other is to talk well. After all, everyone wants to recruit people to work with. Good luck!