1, which means 1 till 3 o'clock in the morning. The fourth ugly, the second moment. The clown is the second hour of twelve o'clock, which is called cock crow, also called pheasant. The four-watch day belongs to the Ding night in the ancient five-watch punctuality method at night.

2, from: Du Fu's "Moon" poem: "Sigeng Mountain spits the moon, the water is bright at night." Lu You's poem "Snow Removal at Night": "The north wind blows four watches, Jiarui Tianjiao, at the beginning of the year." Chen Yushi's poem "Get Up Early in beginning of spring" says: "Dress and don't sleep, I hope it will be spring when I am young."

Related knowledge of twelve o'clock

1, the ancient working people divided a day and night into twelve periods, each 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.

2. Twelve-hour system. It was 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.

3. 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." The basic stereotypes are named.

Twelve o'clock 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.

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