In Feng Shui, the door of the house, the door of the room, the balcony or the back door are exactly in a straight line. This is the draft, and the draft means spreading wealth. Because in Feng Shui, it is important to hide the wind and gather Qi in order to gather wealth. The wind in the hall vents the incoming Qi straight away, so it is called money leakage. Therefore, when this kind of situation occurs in the house layout, a porch is set up inside the main door, and the back door or balcony door is kept closed and a curtain is installed to solve the problem.