First decoction: Decoct other herbs on high heat for 30-40 minutes before adding other herbs to the same decoction (can be decocted together). 1.Difficult to dissolve in water: gold and stone minerals: raw gypsum, ochre, raw magnetite, etc. Those belonging to the category of armor and bone: raw dragon bone, raw dragon’s tooth, tortoiseshell, turtle shell, turtle plate, buffalo horn, goat horn. Those belonging to shellfish: mother-of-pearl, corrugated seed, sea-floating stone, raw oyster, raw cassia, purple shellfish teeth. 2, poisonous or strong effect of the drug: black appendicitis, fine Xin, raw half-summer, raw southern star, and so on. 3, first decocted drugs can be decocted together, need to be soaked first. 4, the first decoction of drugs need to add a sufficient amount of water at a time, do not add water several times during the decoction. Posterior: Put into the pot for decoction 5 minutes before other medicines are ready to be decocted, and add in 2 times. 1.containing volatile ingredients such as mint, artemisia, patchouli and cinnamon. 2, should not be decocted for a long time, such as cardamom, nutmeg, hookah, almonds and other drugs. 3 Another rhubarb want to use its power of precipitation and diarrhea, it is also desirable to be placed after the decoction, decoction for 3-5 minutes. Melting: first add warmth to dissolve it, then add it to the decoction that has been de-slagged and slightly boiled, or stir it while it is hot to dissolve it: Colla Corii Asini, Antler Colla Corii Asini, etc. Dissolve: directly in the decocted medicinal liquid: mannite, xuanming powder. Punching: It can be taken directly with medicinal broth: Panax ginseng powder, pine pollen, etc. Separate decoction: separate decoction, the juice is directly blended into other medicinal liquid to be taken: ginseng, American ginseng, deer antler, cordyceps and other valuable medicines.