Prevent, stop, and investigate illegal and criminal activities; maintain public order and suppress acts that endanger public order; ensure traffic safety and order, and handle traffic accidents; organize and implement firefighting operations, and conduct fire safety supervision; Manage firearms, ammunition, controlled knives, and hazardous materials such as flammable and explosive substances, highly toxic substances, and radioactive materials; regulate special industries as stipulated by laws and regulations; provide security for specific individuals designated by the state and guard important venues and facilities; Manage assemblies and similar activities; administer household registration, nationality, entry and exit affairs, and matters related to the residence and travel of foreigners within China; Maintain public order in border regions; enforce sentences for criminals sentenced to control, detention, or deprivation of political rights, as well as those serving sentences outside prisons; supervise and monitor criminals granted probation or parole; oversee the security protection of computer information systems; guide and supervise public security protection work for state organs, social organizations, enterprises, institutions, and key construction projects; guide public security prevention efforts for mass organizations such as public security committees.