5 o'clock is the expression of human normal biological clock. From the perspective of TCM health, the law of work and rest should be to go to bed early and get up early. There is also a saying that when the sun gets up, the spirit of the sun will grow in spring, and the spirit of man's sun will grow with the spirit of nature. The spirit of the sun in a day is related to getting up in the morning. Getting up early in the morning will make the spirit of the sun grow faster and people's motivation will be improved. If you get up late every morning, the yang will not germinate, and the yin will take the initiative, then everything will not grow, people's qi will be suppressed, and diseases will occur after a long time. Therefore, going to bed early and getting up early, or even going to bed late and getting up early, is the real health. If you get up at 5 o'clock every morning, it is a healthier routine.