China Naming Network - Solar terms knowledge - The difference between orientation and air intake in geomantic omen
The difference between orientation and air intake in geomantic omen
The situation you mentioned may also exist, because one side of Gate A is a dead end, while the other side is a big front hall or a vibrant place, although it is a small door or window. In this way, the main gas in this room comes from this gas inlet, so he can say that the gas inlet is in B.