Hang a convex lens, eight diagrams mirror or five emperors' money at the door. The convex lens is like a turtle shell, which has a reflective effect. When something evil rushes in, the convex lens can remove the evil.
As the name implies, the Eight Diagrams Mirror is eight kinds of images corresponding to eight kinds of fields. Among them, Taiji diagram condenses the information of cosmic balance, which can dissolve the influence of gas field transformation and remove unfavorable terrain, while the five emperors' ancient money can improve the efficacy of convex mirror, and the real five emperors' money has an effect, but the antique money has no effect.