Principal room: This is a house in front of the quadrangle, which usually faces south. Also called building a house. Partial houses refer to the east-west hatchback houses in quadrangles.
From the house, you can distinguish the identity of the owner of the house. The owner of the house lives in the main house, and the children or younger generations live in the wing.
The main room has good lighting, but the side room has poor lighting. From the ranking of housing, we can see the traditional customs of respecting, loving and respecting the elderly in China. We should pass on this spirit of respecting and loving the elderly.