Generally speaking, Chinese medicine should be decocted twice and divided into 2-3 drinks. Decoction is to soak the medicine in cool water for 20 minutes to more than half an hour, then after boiling it in a martial fire, change it to a gentle fire and cook it slowly, pouring out the juice in the first 30 minutes, adding cool water again in the second and boiling it for 25 minutes. Some drugs in Chinese medicine should be decocted first, such as ore and shell drugs, such as dragon bones, oysters and turtle nails, which are recommended to be decocted for more than 20 minutes. For some toxic drugs such as Radix et Rhizoma, Black Radix et Rhizoma is toxic and experienced doctors generally recommend decocting it for at least 40 minutes or even more than an hour. If the dosage of epiphyllum is particularly large, some experts recommend soaking it in boiling water and then boiling it for 3 hours on high heat before boiling the rest of the medicine. The drugs under the latter are usually aromatic drugs, and if the decoction takes longer, the fragrance will dissipate and the effect will be weakened, so such drugs are usually put in 5 minutes before the pot. Drugs that are wrapped in gauze, such as pu huang, should be decocted. Therefore, the decoction of Chinese medicine must be decocted first and then put in under the doctor’s instructions. Other drugs are noted such as some powders are rushed in, some powders are dissolved inside, and there are more instructions some drugs should not be decocted for a long time, such as cold medicine decocted for 10-20 minutes is good, tonic medicine can be decocted for a longer time, so that its ingredients are fully dissolved.