Not good. Unit-type housing refers to a form of residential construction in multi-story and high-rise buildings. It is not good for the east door to be 3 cm wide and 5 cm higher than the west door. It will affect the harmony of the neighborhood. Usually there is only one staircase on each floor, and residents directly enter the door from the stair platform. Generally, 2 to 4 households can be arranged on each staircase in multi-storey residences. Therefore, the control area of ??each staircase is also called a living unit.