1. If the parties are defrauded or fail to perform the contract, they can lodge a complaint with the Labor Bureau for arbitration.
2. If it is commercial fraud, you can complain to the consumer association and demand compensation.
3. If there is evidence to prove that it constitutes a fraud crime, report it to the public security organ. But no matter what form, we should pay attention to collecting evidence. The prosecutor should at least provide the name of the defendant.