Legal analysis: keep food samples, dining vouchers, photos and other relevant evidence and promptly complain to the industrial and commercial bureau, food supervision bureau, consumer associations and other institutions, so that relevant departments can check and punish and claim compensation from the operators. Consumer dispute: 1. Negotiate with the operator. 2. Ask the consumer association for mediation. 3. Complain to the relevant administrative department. 4. Arbitration by arbitration institutions. 5. file a lawsuit with the relevant department.

Legal basis: Article 34 of the Law of People's Republic of China (PRC) on the Protection of Consumers' Rights and Interests, the relevant state organs shall, in accordance with the provisions of laws and regulations, punish business operators for illegal and criminal acts that infringe upon the legitimate rights and interests of consumers in providing goods and services.