What is the recruitment mode of the talent market? What's the trick? Do some companies charge registration fees?

If it is a job fair, you can pay more attention to the job fair information on major recruitment websites or on TV, and then apply with your resume, which is generally free.

If you mean an intermediary company or something, you may have to pay some intermediary fees. You tell them the type of job you want, and then they help you contact the applicant.