So what are the twelve hours? The ancients divided the day and night into twelve hours, each hour is called an hour, each hour is equivalent to 2 hours now. The twelve hours were created by the ancients based on the natural pattern of the sun’s presence and absence during the day, the changes of the sky, and their daily production activities and habits. The twelve hours are composed of twelve specific time terms. Chinese medicine represents the twelve hours by the twelve earthly branches, which correspond to the corresponding five elements, the five organs, and the twelve meridians of the ziwu flow. The twelve hours are divided into: Midnight: It is the first hour of the twelve hours, from 11:00 p.m. of the previous night to 1:00 a.m. of the same day, and the earthly branch is called Zi Shi. “Cold Mountain Temple outside Gusu City, the sound of the bell at midnight to the passenger boat” refers to this time. As the saying goes, there are three major treasures for health: three cold, two down, seven full. The so-called “two down”, that is, to sleep well “meridian sleep”. Ziqi is the heaviest yin of the day, is also the best time to sleep, “Ziqi sleep, nap at noon”, before the Ziqi sleep, sleep effects far more than other time periods, and is conducive to nourishing yin. If you do not sleep at the time of the son, sleep deprivation, the next day’s spirit is obviously not good, seriously affect the work, learning efficiency. Rooster: It refers to 1 to 3 o’clock after late night, and the earth branch is called the ugly hour. At the ugly hour, qi and blood flow into the liver meridian, “the liver collects blood”, “sleep then blood to the liver”, to ensure that the sleep at this time is in the liver, in nourishing blood. Human thinking and action depend on the support of liver blood. If you don’t sleep at the ugly hour, you will not be able to complete your metabolism. Pingdan: Before the sun is exposed to the horizon, the time when the sky is just dawned is called “Pingdan”, which is expressed by the earth’s branches as Yin, that is, 3 to 5 o’clock every morning. The lung meridian is at its peak at c, and the lungs are facing the hundred veins, so “where the pulse of illness is diagnosed, the day of the Pingdan prevails”. “The lungs are facing the hundred veins, and fresh blood is sent throughout the body through the lungs, so people look rosy and energetic in the early morning. A healthy person should be in a deep sleep state at this time, completing the transformation of life from static to dynamic through deep sleep. Sunrise: It refers to the time when the sun rises above the horizon, “the sun rises and works, the sun enters and rests”, and the earth branch is called Mao, which refers to 5 to 7 o’clock every morning. At this time, the rising sun rises in the east, shining the earth, giving people a sense of vitality. At this time, qi and blood are injected into the large intestine meridian, which is the most vigorous and promotes the absorption of water and nutrients in food and the discharge of dregs from the large intestine. At this time, we should defecate normally to get rid of waste and toxins, so we should make it a habit to defecate in the morning. Food time: It is the time of “morning food” of the ancient people, that is, from 7 to 9 o’clock every day, the time of “morning food” of the ancient people is also the time to eat breakfast, and the earth branch is called the time of the eighth hour. At the time of the eighth hour, qi and blood flow in the stomach meridian, the stomach meridian is the most vigorous, this time to eat breakfast is the easiest to digest, can supplement the nutrition, eat more will not gain weight, so breakfast must eat more, eat well. Corner: near noon for the corner, that is, from 9 to 11 a.m., with the earth’s branches for the time of the year. The spleen meridian is at its peak at the sixth hour, “the spleen is the master of transport and transformation”, the spleen’s transport and transformation function is good, it can be smoothly digested and absorbed. “The spleen governs blood”, “the spleen opens the mouth, and its flowers are in the lips”, the spleen functions well, the lips are red and moist. The spleen is like a busy little maid, if it is sick, all the five internal organs will be uncomfortable, and you will get the so-called rich diseases, such as diabetes or something. If the body has problems such as wasting, drooling, swelling, etc., they all belong to spleen diseases. The middle of the day: It is from 11 to 13 o’clock every day, and this time is named by the earth branch as noon time, which corresponds to the son time. At noon, qi and blood flow into the heart meridian, which is at its peak. Midday is also the time of the meeting of yin and Yang, when the Yang is the most vigorous, known as the Yang, this nap is conducive to Yang. Rest 30 minutes at lunchtime can be, because at this time the Yang is strong, the best work efficiency, nap time is too long, not only a waste of valuable time, and will disrupt the body’s biological clock, affecting the night sleep. But nap must sleep, even if you can’t sleep, but also to close your eyes to rest, in order to facilitate the normal intersection of the body’s yin and yang qi. Sun Declining: The sun is past the middle of the day and slants to the west, “Sun Declining” is the untimely hour, 13 to 15 o’clock daily. At this time, Qi and blood flow into the small intestine meridian, which is at its peak. “The taste of things is the essence. The small intestine divides and clears the turbidity, sending metabolic waste to the bladder and large intestine, while the essence is transported to the spleen. Asr time: the earth branch is known as Shen Shi, refers to the 15 to 17 hours every day, is also the time when the ancient people eat the second meal. It is also the time when the ancient people ate their second meal. At the Shen hour, qi and blood flow into the bladder meridian, which is at its peak, so it is appropriate to drink water at the right time. The bladder meridian is the vein of the foot sun, up the forehead and to the top, this is a good time to study and read, the so-called “morning and receive work, evening and study to resume. Day into: for the sun set, this time the chicken began to return to the nest, the earth’s branch is called You Shi, refers to the daily 17 to 19 hours. You time qi and blood flow injection in the kidney meridian, the kidney meridian is the most vigorous. “You” means achievement. If Mao represents the opening of a day or a year, You represents the closing of a day or a year. Kidney in the You hour into the storage of the essence of the hour, the body is manifested at this time are the collection function of the kidney problems, kidney Yang deficiency You time to supplement the kidney Yang most effective. Dusk: refers to the sun has set, the sky wants to dark but not dark, the world is dim, everything is hazy, so it is called dusk, the earth’s branch is called xu Shi, refers to the daily 19 to 21 hours. At the 11th hour, Qi and blood flow into the pericardium meridian, which is the most prosperous. At this time, yin is in full bloom and yang will be exhausted, and the “Tanzhong” of the pericardium meridian is the main joy, so people usually have evening entertainment activities at this time. People set: refers to 21-23 hours of the night, and the earth branch is named Hai Shi. At this time, Qi and blood are injected into the Sanjiao meridian, which is the most prosperous and leads to all the veins. The sign of the sign of the year Hai is the pig, and the pig sleeps when it has eaten and grunted. So at the hour of Hai we have to rest, let the body and soul are immersed in the warm darkness, let the life and body reincarnate in rest and nurture new life. The song of Ziwu flow: bile meridian Linobiao at Zi, liver meridian Taichong at Ugly; lung meridian Taibuchi at Yin, large intestine Sanzhong at Mao; stomach meridian Shiguili at Chen, spleen meridian Taibai at Si; heart meridian Shenmen at noon, small intestine Houxi at Wei; bladder bones at Shen, kidney meridian Taixi at You; pericardium Daling at Hundred, Sanjiao Zhongxu at Hai; if you know the Ziwu flow chart, you can get rid of diseases and live a long and strong life.