Many people have heard similar words and I have said them to almost every patient I have seen, but some people do not take them seriously. Because of the time constraints of the clinic, I feel it is necessary to explain and emphasize it through this network to draw attention to it. Modern people do not have to and cannot work at sunrise and rest at sunset as the ancients did, but I emphasize: you should at least go to bed before 11 pm (i.e., before the hour of the son). The ancients believed that “Zi Zi” (23:00 to 1:00 local time) is the time when yin and yang turn over, so sleeping before then will not interfere with the smooth handover of yin and yang, and will help maintain the dynamic balance of yin and yang, which is the foundation of human health. “When yin is calm and yang is secret, the spirit is healed”. Although the yin energy is strong at “Zi Zi”, but a Yang is born, Yin is the main quiet, Yang active, so we will have after the “Zi Zi” often not easy to sleep such feelings. “In ancient times, diligent people still read hard under the lamp on the third night, and get up early on the fifth night to start studying hard, the so-called “three nights of light and five nights of chicken, it is the time for men to study! “! In the long history of mankind, the time to have the ability to take fire is not very short, but the fire to light up the night to entertain, to work is occasionally, modern people’s extensive and rich nightlife but a hundred years, and the implementation of each of us, the real bad habit of staying up late, often after work. I often say to my patient friends: want to take your bad habits formed in recent years to fight thousands and thousands of years of human habits formed by the biological clock, trying to fight trillions of years of evolutionary formation of the law, that is to hit the stone with an egg, self-defeating, take their own health joke! Eight hours of sleep during the day is qualitatively different from eight hours at night! Young and healthy people who squander their youth wantonly may not see any damage for a short time, but they will suffer from it for a long time. In my clinic, menstrual disorders, infertility, many of them have the bad habit of staying up late. Look at the dark faces of your friends who often stay up late playing mahjong and bar hopping, care about their health status, and you will know how to cherish your body. My current master, Ms. He Jialin, also often says to her patients, “The female hormones secrete the most at night, so you must sleep early!” She exhorts patients to rest early. In fact, resting early and not staying up late are not only important points for women’s health, but also for men’s health! When I wrote this article, I was ashamed of myself, because although I know very well the ancient principles of health, but often for one reason or another, “know the law” to stay up late. I try to write this post in layman’s terms, just hope to encourage with everyone. Because health is in your hands and mine! For those of you who have been working night shifts for a long time, there is no need to be too frustrated when you read this post. If the work really can not change, then actively establish their own small biological clock, to ensure that every day there are 8 hours of sleep in accordance with their own life pattern, free to follow the fate, optimistic face, will minimize the damage of the night shift.