Is it legal for urban management to control advertisements only for unlocking advertisements?

The urban management takes away the billboard without the knowledge of the parties concerned. If the billboard is illegally set up, then the behavior of the urban management personnel is legal.

according to the regulations on the administration of city appearance and environmental sanitation

article 11 outdoor advertisements, placards, galleries, windows, etc. should be healthy in content and beautiful in appearance, and should be regularly maintained, painted or removed.

the establishment of large-scale outdoor advertisements must obtain the consent of the competent administrative department of city appearance and environmental sanitation of the people's government of the city, and then go through the examination and approval procedures in accordance with relevant regulations.

Article 36 Anyone who commits one of the following acts shall be ordered by the administrative department of city appearance and environmental sanitation of the people's government of the city or the unit entrusted by it to stop the illegal act, clean up, dismantle or take other remedial measures within a time limit, and may also be fined:

(1) Setting up large-scale outdoor advertisements without the consent of the administrative department of city appearance and environmental sanitation of the people's government of the city, which affects the city appearance;

(2) without the approval of the administrative department of city appearance and environmental sanitation of the people's government of the city, stacking materials and erecting buildings, structures or other facilities on both sides of the street and public venues without authorization, thus affecting the city appearance;

(3) Dismantling environmental sanitation facilities without approval or failing to carry out demolition according to the approved demolition plan.