You can add water to the Chinese medicine halfway through the decoction, but there are rules about the time and amount of water to be added, and it is recommended that you consult a medical professional before decocting the medicine. Chinese medicine soup is one of the most commonly used dosage forms, usually before the decoction will be soaked in herbs for 20~30 minutes, so that the active ingredients are easy to decoct, usually the Chinese medicine needs to be decocted twice, the second time to add water for the first time of 1/3~1/2, each time to decoct the amount of medicines obtained to 150ml or so is appropriate, the two times of decocting the medicinal liquid dregs mixing and divided into two times to be taken. Whether the decoction method is appropriate or not is directly related to whether the effect of the medicine can be fully realized. Adding water to the decoction may lower the overall temperature of the decoction, which may reduce the efficacy of the decoction as the medicinal ingredients cannot be decocted properly. It is recommended to consult a medical practitioner before decocting, and follow the doctor’s instructions in decocting and taking the medicine.