People sleep, some sleep for a few hours a day is enough, and some sleep for more than ten hours and still can't wake up. This is a problem of sleep quality. We have five internal organs, namely liver, heart, spleen, lung and kidney, which correspond to soul, spirit, mind and will respectively. That's what people usually call restlessness. When people have problems with their five internal organs or emotions, they will not sleep well, because people have seven emotions: joy, anger, worry, thinking, sadness, fear and surprise. Emotion affects the five internal organs, thus affecting sleep. Starting from the next issue, based on Huangdi Neijing, we will talk about health preservation from the internal organs, so please pay attention …