The ancients said: “The ancient people, who knew the law of yin and yang, and in the arts and figures, eating and drinking in a disciplined manner, living in a regular manner, not delusional labor, so that they can be with the gods, and the end of the year, degree of 100 years is to go”, reasonable arrangements for sleep, is the key to longevity, half of a person’s life is spent in bed. Suwen – four qi tune Shen Da Lun” day: “spring March, this is called hair Chen, heaven and earth, all things to glory, sleep at night and get up early, wide walk in the court; summer March, this is called the Fuxiu, heaven and earth, all things flamboyant, sleep at night and get up early, not tired of the day; autumn March, this is called Rong Ping, the weather to urgent, the earth to bright, sleep early and get up early, with the chicken; winter March, this is called closed, water ice ground chap. The best sleep should be according to the concept of “spring and summer for Yang, autumn and winter for Yin”. In the case of a plate: 22:00 in spring, 6:00 up; 22:30 in summer, 5:30 up; 21:00 in autumn, 5:00 up; 20:00 in winter, 6:00 up. But modern people to do the above is very difficult, I suggest that the latest daily should not be more than 23 points before going to sleep, because 23-0 points, the son of the hour, is the heaviest time of the day Yin, when it is necessary to nourish Yin. But lack of sleep has been a civilizational disease of modern people, especially the white-collar family (white bone), often is not to take sleep as a serious matter. On the surface, three hours less sleep seems to be an extra three hours of work, but no attention is paid to the efficiency of work and the damage caused by less sleep. Less sleep is like a debt that you have to pay for. Small debts (less than ten hours) are easy to pay off, but if you accumulate more than 100 hours it’s hard to pay off clearly. Previous sleep studies have focused on the impact of the length of sleep on health, and many studies have found that if the average person does not sleep well for two or three days, they will make up for it within a few days and return to normal. But recent studies have noted that if you sleep less than one or half an hour a day, the long-term accumulation of “sleep debt” on a person will have a great impact. Often stay up late, sleep deprivation, will cause endocrine disruption, when you have the following symptoms that means you are already serious sleep deprivation, must start to pay attention to your sleep, if not pay attention to conditioning, will reduce the body’s immunity. Symptoms: 1, mouth and tongue sores, oral ulcers; 2, bad breath, dry throat, loss of appetite; 3, insomnia, irritability; 4, inattention, slow thinking; 5, cervical pain, pillow.