Small advertisements posted in the corridor shall be supervised by the urban management department or the property management department. The specific jurisdiction of which department varies from region to region, and it is the responsibility of local urban management bureau, urban management law enforcement department, property management company and other relevant institutions. These departments will enforce laws and regulations and punish or clean up illegally posted advertisements. If you find illegal posting of small advertisements in the corridor, you can report to the relevant departments or property management companies, and provide detailed descriptions and photos and other evidence to help them strengthen management and maintain the environmental sanitation of the corridor. Actively participate in community construction and publicity, improve residents' awareness of environmental protection, and create a clean and orderly community environment.