Extended data:
1. The origin of twelve hours: The ancient working people divided a day and night into twelve periods, and each period was called an hour, which was created by the ancient working people in China according to the natural law of the appearance and appearance of the sun in a day, the change of the sky and the daily production activities and living habits.
Second, the significance of twelve o'clock: it integrates the twelve-point regimen of Huangdi Neijing 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 preserve health and popularize scientific regimen, which is undoubtedly of revolutionary significance for improving people's physique and improving people's quality of life.
3. The attributes of twelve o'clock are: there are twelve o'clock in a day (two hours in a modern hour), eight minutes in an hour (15 minutes in a modern hour), three teas in a while (five minutes in a modern tea), and two scents in one tea (two minutes and 30 seconds in a modern one).
Twelve o'clock-Baidu Encyclopedia