In addition, if one of the two connected doors happens to be the back door of the company or the fire escape, then the washing can be eliminated by changing the nature of the door. The specific way is to change this back door or fire door into one-way access, and install a curtain on the door, which can only get out but not in. In this way, the so-called "ups and downs" pattern in Feng Shui is formed, which not only facilitates the passage of tourists, but also contributes to the accumulation of popularity and is very helpful for the promotion of fortune.