When decocting herbs, place the verified herbs in a casserole or decoction pot, add cool water to submerge the drug, soak it for about 20 minutes, and set it on the fire to decoct. After boiling for 20-30 minutes, strain the first decoction through gauze, and then add cool water for the second decoction. Combine the two decoctions and divide into 2 or 3 decoctions to be taken warm on an empty stomach. Decoction should be noted that: 1. The decoction should not be made for a long time to prevent excessive volatilization and weakening of the medicinal power of flowers and leaves. 2, the prescription refers specifically to the next drugs such as sand, rhubarb, hooked vine, etc., can be put in the last 10 minutes, can not be long decoction. 3, tonic thick drugs can be decocted for a longer time. 4.Prescriptions that refer to the first decoction of drugs such as turtle nail, ochre, etc., should be decocted for about 1 hour. 5, should not be water decoction of drugs, such as gum, deer horn gum, powder, etc., must be decocted and filtered juice of other drugs, and then to the people, or dissolved first and then to enter. 6, should not be into the decoction or precious drugs such as musk, ox horn, rhinoceros horn, etc., can be researched, filed into a fine powder, with soup punch. 7.If there are opposite and fearful products in the formula, should not be decocted together, or ask the doctor to decide. 8.Ephedra and Cornus officinalis should be decocted separately to remove the froth, and then combined with other medicines. 9.Horsetail and Radix et Rhizoma should be decocted for more than 1 hour to reduce toxicity. 10, Chinese medicine serving method, generally 1 dose of medicine can be decocted 2 times a large amount of medicine, 2 times still difficult to decoction can also be boiled 3 times, together about 200 ml – 300 ml, according to the morning, evening or morning, noon, evening divided into serving. It is usually taken half an hour before meals on an empty stomach. If it has a stimulating effect on the stomach, it can also be taken 40-60 minutes after meals. Children can take the medicine in small amounts and several times, and finish it within the specified time. Avoid vomiting caused by taking too much medicine at one time.