The specific time of decoction cannot be generalized, but should be determined by the specific medicinal properties. In the case of antiphlogistic drugs, aromatic drugs and antipyretic drugs, the decoction should not be long in order to avoid volatilization of the active ingredients, but 15-20 minutes after boiling. For tonic medicine, it should be boiled with high fire first, and then slow decocted with civil fire for 40-60 minutes. At the same time, the decoction should be stirred 2-3 times. Each dose of Chinese medicine is usually decocted 2 times, and the second time can be slightly shorter. For toxic drugs or ore-based drugs, such as sapodilla or magnetite, they should be decocted for 1-2 hours first in order to eliminate the toxicity of the drug and ensure that the active ingredients are decocted before decocting with other drugs. The medicine needs to be soaked in water for 30-40 minutes before decoction to remove impurities. It is not advisable to drink Chinese medicine with spicy and stimulating food, seafood and other hairy substances, which may reduce the effectiveness of the medicine and even produce adverse reactions and affect health.