If you sign up on your mobile phone and the health manager finds that you have been cheated, you can save the relevant evidence of your registration as a health manager on your mobile phone, such as payment voucher, business license or telephone number of the other party, and report to the police station as soon as possible. If the amount involved is relatively large and the number of people is relatively large, the police will file a case for investigation. I suggest you take relevant exams in the future and try to go to formal institutions. Avoid being cheated.