What is the importance of feng shui when building a two-and-a-half-story building?

Hello, let me answer this question. Architectural design code, there is no concept of two and a half floors, either three or two floors. The word "half" in the geomantic omen of Yangzhai is incomplete. It is unlucky to pay half and the world will be separated. Two and a half floors are 2, 5. This meaning needs no explanation. Please be careful.