《晋书·志·第六章》
候气的方法是，造三重密室，紧闭门户，并用血涂四壁，挂桔红色的帘幕。
候气之法，为室三重，户闭，涂衅周密，布缇幔。
The method of waiting for the qi is to build three secret rooms, close the doors tightly, smear the four walls with blood, and hang orange-red curtains.