The height of billboards is 1 according to the law. The installation of outdoor signboards shall not destroy the relationship between composition and form, and shall not cover up the changes in the facade.

2, outdoor advertising signs shall not exceed the top of the parapet, if there is no lintel and difficult wall, signs can be set near the roof, but the height shall not exceed one fifth of the height of the facade.

3. For buildings with entrance components, outdoor signboards should be set in the entrance components, and the width of the signboards should not exceed the width of the entrance components.

4, antique commercial street, antique pedestrian street to encourage the establishment of various forms of shop signs, signs should be small plaques, lanterns, antique light boxes and other small signs, in harmony with the surrounding environment.