In general, it is not advisable to soak Chinese medicine overnight before boiling. Because soaking for too long, the first is easy to lead to deterioration, and the second is not of special significance to the treatment, so it is not recommended to soak for a long time. But Chinese medicine in the simmering before a simple cleaning, remove impurities or soak 2-4 hours, is conducive to simmering, is scientific and reasonable. Depending on the nature of the medicine itself and the effect to be achieved in treating the disease, the soaking situation and the time of the next soup are also different. In general, there are methods such as first decoction, packet decoction, later decoction, molten, and another decoction. The specific method of decoction of the medicine is a science and a study, and it is necessary to consult the prescribing Chinese medicine practitioner or Chinese pharmacist so that better advice can be given.