The Zodiac, also known as the Zodiac, is twelve kinds of animals in China that match the twelve earthly branches according to the year of birth, including rats, cows, tigers, rabbits, dragons, snakes, horses, sheep, monkeys, chickens, dogs and pigs.

2. 12 warps:

The twelve meridians is the main body of the meridian system, which has the main characteristics of exterior-interior combination and corresponding zang-fu organs and meridians. Including three yin meridians of the hand, three yang meridians of the hand, three yang meridians of the foot and three yin meridians of the foot, also known as "Zheng Zheng".

3 12 hours:

The ancient working people divided a day and night into twelve periods, and each period was called an hour. Twelve o'clock can refer to either a day or any time. Twelve o'clock was created by the ancient working people in China according to the natural laws of the sun, the changes of the sky and the daily production activities and living habits.

The origin and significance of twelve o'clock

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. In the early Han Dynasty, China implemented the taichu calendar Law. "Twelve o'clock a day, the main branch is the subject." 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.