Chinese medicine soup is the most common and main dosage form of Chinese medicine. There are certain requirements for decoction of soup: 1. Decoction utensils should preferably be made of casserole, tile pot or enamel, stainless steel can also be used, but avoid using iron, aluminum and copper products; 2. Water used for decoction should be clean and clarified, odorless, without impurities and with little mineral content. Generally speaking, any water that can be consumed in daily life can be used; 3. Decoction method, first soak the drug, because most of the Chinese medicine comes from the dried plant products, by adding water to soak, can make the herbs fully absorb water and become soft, after the expansion of tissue cells, back to the natural state, decoction will be easy to decoct the active ingredients. The time of drug soaking is about 1 hour, and the soaking time should not be too long, so as not to cause drug enzymatic decomposition and mold decay, so as to ensure that most of the effective ingredients in the herbs are not destroyed. Generally speaking, herbs are processed and prepared before they are sold, so there is no need to wash them before decoction. If you feel that the herbs are dirty, you can rinse them quickly with water before soaking, but do not soak and rinse them to prevent the loss of a large amount of active ingredients that are easily soluble in water, thus affecting the efficacy of the herbs. Decoction is not suitable to use hot water for soaking, and the second decoction should also be made with cool water so that the medicinal properties can be completely decocted. Generally, the time of drug soaking is about 1 hour, and the soaking time should not be too long to avoid enzymatic decomposition and mold decay, so as to ensure that most of the active ingredients in the herbs are not destroyed.