There is a big tree in front of the gate. Can I put a concave-convex eight diagrams mirror?

Solution: Hang a convex lens or eight diagrams or five emperors' money at the door. A convex mirror, like a tortoise shell, has a reflective function. When something evil rushes in, the convex mirror can melt away the evil. As the name implies, the Eight Diagrams Mirror is eight kinds of fields corresponding to eight kinds of images. Among them, Taiji diagram condenses the information of cosmic balance, which can resolve the influence of gas field transformation and remove the adverse terrain from itself. Five emperors' ancient money can improve the efficacy of convex mirror.