During the period of clean water cultivation, because there will be no exogenous heat input (no rice, no rice, no porridge, no cake, no fish, no shrimp, no meat, no eggs, no milk, no smoking, no drinking), we can provide the calories needed for daily life by burning human body fat (preferably waist, abdomen and buttocks fat) and glycogen reserves. You need to consume a lot of water in the process of burning fat. At the same time, because the human body needs to excrete the metabolites (such as urea and uric acid) produced by fat combustion through urine, it also needs a lot of water. Therefore, you usually feel thirsty during the clean water regimen, which is an important sign that the human body burns fat. At this time, you need to drink more water. It is usually recommended to drink 4-7 liters of water every day, such as drinking tea water (preferably light tea, and it is recommended to drink less at night to avoid being too excited to affect sleep), drinking ginger soup (without adding brown sugar and rock sugar), or drinking clear water health-care drinks and ginger soup boiled with ginger slices, which can not only replenish water but also warm the body, and also drink hot tea.