1. Buy medicine: Chinese medicine can be purchased at regular pharmacies, usually buy only one pair for the first time, and then buy the remaining amount of Chinese medicine after taking it without adverse reactions. The prescription of Chinese medicine should be kept properly for the next outpatient reference. 2. Soaking: Before decocting herbs, soak them in cold water for more than 30 minutes. Tap water is sufficient for decoction, and the amount of water should be soaked 2 cm over the surface of the herbs. 3. Operation: When decocting herbs, care should be taken to stir the herbs so that the liquid is fully decocted. Each dose of Chinese medicine is usually decocted three times. After boiling the herbal solution with medium heat, change to slow simmer for 5 minutes after boiling for the first time, change to slow simmer for 10 minutes after boiling for the second time, and change to slow simmer for 15-20 minutes after boiling for the third time. Let it cool down on its own for 5-10 minutes after each completion and then pour it out. From the economic point of view, it is also possible to make a fourth decoction, and generally use the fourth liquid with tap water as the solvents for the next medicine. 4.Preparation: After decocting the herbs for 3 times, put them together and mix them well, put them in an airtight clean container and keep them in a cool place or in the freezer, and shake them well before pouring them out again. 5.Take: Chinese medicine is usually taken 1-2 hours after breakfast and dinner, and generally a pair of medicine is taken within 2 days, that is, one quarter of the total amount taken each time. After taking the medicine, you can add a small amount of sweet food to correct the taste, such as the liquid has been cooled can be heated to about 40-60 degrees, to reach a suitable drinking temperature can be, simple tranquilizing drugs can be taken only in the evening. If the amount of liquid is too much, it can also be taken as tea and consumed in variable amounts. 6, rural areas can not be prepared according to the above method of preservation, but also can be decocted once, serve once, decocted 4 times to serve 4 times. The first dose is taken in the evening.