The mirror that can be seen above the door of many Chinese houses today is a continuation of this tradition. Actually, this is only one instance of the suggestive power of mirrors.
鏡子在道士心目中，竟具如此辟邪能力；今日仍然常見民宅門楣懸掛的鏡子，基本上還是這類辟邪思想的延長。