Preparation (decoction) of Materia Medica
Use of the following types of heat-resistant containers （pan，pot） for decoction: enamel, glass, stainless steel.
Preparation (decoction): in general, one pack of the herbs(materia medica) is for one day’s use. Place the herbs in the chosen pan or pot and add enough cold water that the herbs are just submerged under the water. Cook, or simmer, the herbs for 30 minutes. Pour off the liquid (circa 150 ml), add water once again as above, and repeat the procedure for 20 minutes. Pour off the liquid again, and mix it together with the liquid obtained from the first decoction. Drink half the liquid in the morning, and the second half in the evening, half an hour after meals.