Four Substance Soup needs to be boiled for about 30 minutes.
1. Before boiling, the medicine needs to be soaked in cold water for about 20 to 30 minutes.
2. After the medicine has been soaked, water can be added for decoction. Generally, after the tablets are properly pressurized, it is appropriate for the water to be 2 to 3 cm above the surface of the medicine.
3. After adding the water, first use the fire to make the medicine boil as soon as possible to save time, and then use the fire to continue to decoct, so that the medicine to maintain the state of micro-boiling, so as to avoid overflowing or too quickly boil the medicine dry. The decoction will take about 30 minutes to cook. Generally speaking, Chinese herbal medicines should be decocted twice, and the amount of water added in the second decoction should be 1/3~1/2 of the first decoction, and the decoction of the second decoction should be dregsed, filtered and mixed, and then divided into 2~3 times.