What is Chinese medicine pour water decoction?

Long running water, boiled water, rootless water and pouring water are all names of water with different properties in traditional Chinese medicine, which are mainly used for the treatment of different diseases. Among them, pouring water refers to "gathering of doctors": just pour water into the house. In other words, the water left by pouring water to a high place is pouring water. Then use this water to decoct the medicine!