2) Because the gas field comes in through the door, it goes directly into the bathroom and then goes out with the bathroom.
3) if it is not understood as discharge, it can be understood that the gas field enters the bathroom and then distributes in all directions of the house.
4) Bad luck! Because the absorbed gas field is not good.
5) The solution is: the bathroom door is always closed, if you can put things like cabinets at the door of the bathroom, or simply put a bonsai at the door of the bathroom.