Green line: refers to the control line of various urban green spaces; Blue line: refers to the protection and control of urban surface water bodies such as rivers, rivers, lakes, reservoirs, canals and wetlands determined in urban planning Regional boundaries; Purple line: refers to the boundaries of the protection scope of historical and cultural blocks in national historical and cultural cities and the historical and cultural blocks announced by the people's governments of provinces, autonomous regions, and municipalities directly under the Central Government, as well as the historical and cultural blocks outside the historical and cultural blocks announced by the people's governments at or above the county level. The boundaries of the building's protection area.

Black line: refers to the control range of high-voltage line land; Yellow line: refers to the control boundary of urban infrastructure land that has an impact on the overall urban development and is determined in urban planning and must be controlled; Orange line : refers to the control boundary of railway and rail transit land.

The "General Principles of Design of Civil Buildings" (JGJ37-87) stipulates that the steps, platforms, window wells, underground buildings and building foundations of buildings, except those connected to urban pipelines within the base, Other underground pipelines are not allowed to protrude from road red lines. Architectural protrusions that are allowed to protrude from the red line of the road:

1. Above the sidewalk ground:

(1) Window sashes and window coverings of more than 2 meters are allowed to protrude, and the protruding width is not greater than 0.4 meters;

(2) Protruding movable shading is allowed over 2.5 meters, and the protruding width should not be greater than the width of the sidewalk minus 1 meter, and should not be greater than 3 meters;

(3) 3. Balconies, convex windows, awnings, and overhangs are allowed to protrude over 50 meters, and the protruding width should not be greater than 1 meter; (4) Canopies, overhangs, and overhangs are allowed to protrude over 5 meters. The width should not be greater than the width of the sidewalk minus 1 meter, and not greater than 3 meters.

2. Over roads without sidewalks:

(1) Window sashes and window covers are allowed to protrude above 2.50 meters, and the protruding width should not be greater than 0.4 meters;

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(2) It is allowed to protrude awnings and overhangs over 5 meters, and the protruding width should not be greater than 1 meter.