In ancient times, a day and night was divided into twelve hours, that is, one hour was equivalent to two hours now, and the corresponding relationship between the twelve hours and the twenty-four hours now was 17 ~ 19.

Starting from Jiazi Day, the main branches of this day are Jiazi, Night Ugliness, Bingyin, ..., while Night Hatred Day is Bingzi, Night Hatred, Wuyin, ... and it goes on according to 60 Jiazi cycle. According to its inherent law, therefore, the ancients also summed up a formula of five rats escaping from the sun, as follows: A plus A, B plus G for the first time. Bing Xin starts from E and lives in Geng Zi.

How can I send it? It means that the time of day is Jia Zi, Yi Chou, Bing Yin and Ding Mao. The working hours of Party B are Bingzi, Ding Chou, Wuyin, ... Yiyou ...; Bing Xin's working hours every day are Wu Zi, Ji Chou and Geng Yin. Ding Ren's working hours every day are Renzi, Guichou and Jiayin. That is to say, only the second day or Geng Day will have a good life.

Extended data

This is the twelve-hour system used in the Western Zhou Dynasty. In the Han Dynasty, it was named Midnight, Crow, Pingdan, Sunrise, Food Time, Horn, Japan-China, Sundial, Sunset, Dusk and Man's Decision. It is also expressed by the twelve earthly branches, and it is the child time from 23: 00 to 1 at midnight, the ugly time from 1 to 3: 00, and the Yin Shi time from 3: 00 to 5: 00, which are recursive in turn.

Twelve o'clock consists of twelve specific time nouns. People can find the source of these words from the ancient books of China in the pre-Qin period. Before the Han Dynasty, these appellations were different. Until the early Han Dynasty, China implemented the taichu calendar Law. "Twelve o'clock a day, the main branch is the subject." (Zhao Yi's Examination of Jade Cong, Volume 34) Basic stereotypes and naming.

The twelve o'clock calendar is unique and has a long history. It is an outstanding contribution of the Chinese nation to the astronomical calendar of mankind and one of the splendid treasures of Chinese culture.

At twelve o'clock, the twelve-point regimen of Huangdi Neijing is integrated into people's daily life through timing tools, reminding people of scientific regimen at any time and letting everyone know how to use Huangdi Neijing to carry out regimen and popularize scientific regimen, which is undoubtedly of revolutionary significance for improving people's physique and improving people's quality of life.

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