Is it illegal to post ads?

It is illegal to post small advertisements on the wall at will and violates the "Urban City Appearance and Environmental Sanitation Management Regulations". According to Article 17 of the "Urban City Appearance and Environmental Sanitation Management Regulations", all units and individuals are not allowed to write or engrave on urban buildings, facilities and trees. Units and individuals must obtain approval from the city appearance and environmental sanitation administrative department of the city people's government or other relevant departments before hanging or posting promotional materials on urban buildings and facilities. Article 11 When outdoor advertisements, placards, galleries, showcases, etc. are set up in the city, they must be healthy in content and beautiful in appearance, and must be regularly maintained, decorated, or dismantled. The installation of large-scale outdoor advertisements must obtain the consent of the city appearance and environmental sanitation administrative department of the city people's government, and go through the approval procedures in accordance with relevant regulations.