Is it risky to help other companies with job fairs?

If you help a company to carry out online recruitment activities, you will provide help for free, and there will be no risk, because you are volunteering to help, not running business. If the service fee is charged, it is a business activity, and there will be risks in carrying out business activities. But if you can restrain the behavior of both parties and safeguard your legitimate rights and interests through an agency contract, the risk will be minimized.