What should I do if the other person doesn't talk when I submit my resume at the job fair? How should I start?

You can introduce yourself first, and the interviewer will definitely have questions for you. If he doesn't respond, there are two possibilities: one is that he is not interested in you, and the other is that he wants to continue to give you the opportunity to show. This is a kind of stress interview. At this time, you should take the initiative to ask the interviewer what questions you want to ask! For example, "Hello! Is there anything else you need to know? Where is your company? How big is the company? " Explain that you are very interested in the company you are applying for and want to join that company!