What does the door do to the air outlet of the ventilator?

The door is the main entrance to the house. If the door is facing the range hood, the dirty air coming out of the range hood outlet will directly enter the house, forming a fierce evil that is not conducive to the geomantic omen of the house. To solve this kind of suffocation, it is necessary to hang a mirror on the porch or door, and set a screen or wall in the inner porch, so that the dirty air can't drive in directly.