At home, which room does Big Brother sleep in? There are always four rooms upstairs and downstairs. Does this have anything to do with Feng Shui?

It is not the householder who lives in the building, but the oldest elder in the building. If there are parents or grandparents, the eldest brother can't live in the house, and the younger brother should be under the eldest brother. The house faces south and east. If there is an elder in the easternmost room on the first floor, it belongs to the elder, otherwise it belongs to the eldest brother. The first floor is bigger than the second floor, and the east is bigger than the west. This is the principle.