Businessmen who were deceived into buying learning machines during the Food Festival lost contact and ran away, so they can complain to the Market Supervision Bureau about the manufacturers. The Market Supervision Bureau was formed by the merger of the former Industry and Commerce Bureau, Food and Drug Administration, and Quality Supervision Bureau. In some areas, it also incorporated functions related to price, alcohol, and animal supervision. Mainly responsible for the registration and licensing of market entities, maintenance of market order (anti-monopoly, anti-unfair competition, trademarks, advertising, contracts, prices), supervision of food, drugs, cosmetics and medical devices, supervision and management of special equipment for quality measurement standardization, etc.