Strong error correction: the saying that you are tired and thin is getting untenable. If you stay up late for a long time, you may eat supper and generally get fatter. Why? Biologically speaking, people are animals that move during the day, and at night, various functions of the human body naturally enter a state of rest. Only synthetic fat insulin is secreted more at night. This means that eating the same thing at night is more likely to turn into fat deposits. Therefore, Chinese medicine has the theory of "harmony between man and nature", that is, work hard at dawn and have a good rest when it is dark.