The local public security organ reported the case. Guangzhou Tianhe, where 20,000 people were cheated, should immediately report the case to the local public security organ and actively cooperate with the police investigation. You can collect evidence related to the case, such as chat records, transfer records, account information of the other party, etc. Report the case to the local public security organ, describe the fraud process in detail, provide relevant evidence, fill in the report registration form, and record personal information, case details, contact information, etc. And submit the collected evidence to the police for investigation, and the police will try their best to recover the defrauded funds.