Does the gate of Feng Shui refer to the gate of the gatehouse or the gate of the house?

This is a matter of opinion, but I want to remind the questioner that the function of ancient doors is not exactly the same as that of modern doors, so the theory of Feng Shui about doors is inevitably inappropriate. For example, the unit building is different from the ancient doors, whether it is based on the floor door or the house door. Gu Men is an air inlet in geomantic omen, and everyone in this air room can feel it. Now, can you feel the gas absorbed by the door of your apartment building? If the door of the house is taken as the standard, can the door of the house in the unit building receive the outside air? For a simple example, when blowing, the wind from the old house blows in from the gate. It's blown outside the building now. Where does the wind in the house come from?