In Chinese medicine, decoction needs to start from the aspects of decoction utensils, how much water to add, decoction time and so on. 1. Decoction utensils: it is best to use ceramic utensils, such as casserole, casserole pot, because of its stable chemical nature, not easy to chemical reaction with the drug ingredients, and even heat conduction. Avoid using iron, copper, aluminum and other metal utensils for decoction. 2. How much water to add: the general amount of water added to the clinic, the water surface submerged over the drug about 2 centimeters is appropriate. 3. Decoction time: generally after boiling and then decoction for 30 minutes, need to pay attention to the antidepressants and other aromatic drugs, need to be after the next, after boiling and decoction for 5 to 10 minutes; active ingredients are not easy to decoction of minerals, bones and horns, shellfish, etc., after boiling and decoction for more than an hour, so that the active ingredients are fully precipitated. Specific methods of decoction can consult the doctor, follow the doctor’s instructions for decoction.