A: Traditional health care thinks that sleep is the first supplement. There are many sayings among the people: "A good night's sleep is full of energy; Sleepless all night, Yang is the way. " Sleeping at night is to recuperate and recharge your batteries; Working and studying during the day is the release of energy. Yin and Yang are equally divided and indispensable. The rhythm of people's daily life should be consistent with the changes of "spring, summer, autumn and winter". 9 pm to 3 am is a winter day, called Sunday winter; 3 am to 9 am is the spring of the day, called Richun; 9 am to 3 pm is a day of summer, called the sun; From 3 pm to 9 pm is an autumn day, called Riqiu. Beginning of winter at 9 o'clock in the evening at 9 o'clock in the evening, heaven and earth fell asleep. People don't sleep, just like people are tug of war with heaven and earth. "Man's strength is not as good as that of nature", and the result of "tug of war" is that nature will win. The rhythm of human body changes is consistent with the rhythm of heaven and earth, so that we can "borrow heaven's strength to return manpower". 9 pm to 3 am is the best time for people to sleep. Sleep in other time periods can hardly replace "day and winter". Get up in time. At 3 am, it is "beginning of spring" and at 6 am, it is "vernal equinox". Heaven and earth wake up at 3 o'clock, and the cells of human body wake up under the induction of this time and space. You don't need to sleep when you wake up from three to five every day. Sometimes I get more and more tired when I sleep. People who wake up in the morning and don't get up are just like "tug of war". People can't pull out heaven and earth. If you don't get up before 5 o'clock, you won't be able to get out at 6 o'clock in the vernal equinox, and you will lose mentally. Some civil servants often stay up late because of their work, which affects their health for a long time. Because if you sleep at night, you can kill the yang, and you can kill the yang in the morning. This is called "double kill". Therefore, even if you sleep late, you should get up before 5 am and take a nap at noon to prevent "double killing".