It would be nice to build several feng shui rooms in civil houses.

The geomantic omen of Yangzhai is expressed by the number of houses, that is, the number of houses built is not doubled. The Book of Houses says, "Three bedrooms are lucky, four bedrooms are few, and five bedrooms are better than six bedrooms ..." But as far as building a house is concerned, if the family population is small, it is not appropriate to build a large-scale {several bedrooms} house.