This problem belongs to the category of Yijing geomantic omen. If the door of the small warehouse is directly north of you, that is, your cashier faces south, wrap the door with red paper or block the whole small door with red cloth. If you are in the East, you can do the same. If you are in the south or the west, you don't have to deal with it. It would be better if you were a girl. Feng shui theory is too abstruse to explain clearly in a short time. If you believe me, just listen to me. This is the conditioning of feng shui environment. These are minor problems.