In ancient China, a day was divided into 12 hours, and each hour is equivalent to two hours today. According to legend, the ancients named each time according to the time of animals in the zodiac.
Twelve o'clock system was adopted in the Western Zhou Dynasty.
Extended data:
Other time
Zi Shi: 0:00-2:00 before the Tang Dynasty and 23:00- 1:00 after the Tang Dynasty.
Clown: 2:00-4:00 before Tang Dynasty, and 1:00-3:00 after Tang Dynasty.
Yin Shi: It was 4:00-6:00 before the Tang Dynasty, and it was 3:00-5:00 after the Tang Dynasty.
Shi Mao: It was from 6: 00 to 8: 00 before the Tang Dynasty, and from 5: 00 to 7: 00 after the Tang Dynasty.
Chen Shi: 8:00- 10:00 before the Tang Dynasty and 7:00-9:00 after the Tang Dynasty.
Shi Si: before the Tang Dynasty 10:00- 12:00, and after the Tang Dynasty, 9: 00-1:00.
Noon: before the Tang Dynasty 12:00- 14:00, after the Tang Dynasty113: 00.
No time: before Tang dynasty 14:00- 16:00, after Tang dynasty 13:00- 15:00.
Application: before Tang Dynasty 16:00- 18:00, after Tang Dynasty 15:00- 17:00.
You Shi: before Tang dynasty 18:00-20:00, after Tang dynasty 17:00- 19:00.
Time: 20:00-22:00 before Tang Dynasty, and after Tang Dynasty 19:00-2 1:00.
Shihai: 22:00-24:00 before the Tang Dynasty and 2 1:00-23:00 after the Tang Dynasty.
Baidu Encyclopedia-Shenshi