What exactly do the four patrol prevention and control mechanisms mean?

Legal analysis: armed duty in key positions, peak duty in crowded places, street sports standby duty of police special police, and joint armed patrol of public security armed police.

Legal basis: Regulations on Patrol of Urban People's Police

Second people's police patrol duty work, by the municipal public security organs in accordance with the provisions, combined with the local actual situation unified organization and implementation.

Article 3 The patrol duty of the people's police is mainly on foot, and bicycles and motor vehicles are combined. The Municipal Public Security Bureau may designate patrol garrison areas according to the actual situation. Article 4 The people's police shall perform the following duties in patrol duty: (1) Maintaining public order in police areas; (two) to prevent and stop violations of public security management; (3) Preventing and stopping criminal acts; (four) alert the scene of public safety emergencies, to guide the masses and maintain order; (5) Participating in handling illegal assemblies, processions and demonstrations; (six) to participate in the disposal of disasters and accidents, maintain order and rescue personnel and property; (7) maintaining traffic order; (eight) to stop acts that hinder state staff from performing their duties according to law; (nine) to accept the citizen's alarm; (ten) to persuade and stop civil disputes in public places; (eleven) to stop the behavior of mental patients and drunken people; (twelve) to guide pedestrians, help people who are suddenly injured, sick and in distress, and help the disabled, the elderly and children who have difficulties; (thirteen) to accept the goods and try to return them to the owner or send them to the collection and claim department; (fourteen) patrol the security situation in the police area, prompting the relevant units and residents along the street to eliminate hidden dangers; (fifteen) the discipline of picketing the people's police; (sixteen) the people's police to perform other tasks prescribed by laws and regulations.