Legal analysis: It may violate the Public Security Punishment Law. Wearing masks in public places is an emergency preventive measure. Then, if you don't wear a mask in public places and don't listen to dissuasion, it will violate the behavior stipulated in the Public Security Punishment Law, and you can be fined and detained according to the provisions of the Public Security Punishment Law.

legal basis: article 12 of the law of the people's Republic of China on the prevention and control of infectious diseases. all units and individuals within the territory of the people's Republic of China must accept preventive and control measures such as investigation, inspection, sample collection and isolation treatment of infectious diseases by disease prevention and control institutions and medical institutions, and provide relevant information truthfully. Disease prevention and control institutions and medical institutions shall not disclose relevant information and materials involving personal privacy. Where the administrative department of health and other relevant departments, disease prevention and control institutions and medical institutions violate the legitimate rights and interests of units and individuals by illegally implementing administrative management or preventive and control measures, the relevant units and individuals may apply for administrative reconsideration or bring a lawsuit according to law.