In ancient China, people used the method of "copper pot dripping" to measure time, and divided a day and night into twelve hours, namely, Zi, Ugly, Yin, Mao, Chen, Si, Noon, Wei, Shen, You, Xu and Hai, which correspond to the twenty-four hours today. From eleven o'clock to one o'clock in the middle of the night, it's ugly from one to three o'clock, yinshi from three to five o'clock, and so on.
An hour in ancient times was equivalent to two hours today. Therefore, when clocks and watches were just introduced into China, some people called an hour "Da Shi" and an hour in the new time "Hour". Later, with the popularity of clocks and watches, the word "big hour" disappeared, but "hour" has been used to this day.
Extended data:
Time health song formula
Yin got up at dawn and went downstairs with a cup of boiling water; It's so light to go to the toilet regularly, and morning exercise at Mao time is the most pleasant; When I read books and play with my young grandchildren, when I was a cook, I became a kitchen master. Drink less wine at noon, and pay close attention to lunch break before noon; Shen Shi reads newspapers and writes poems, and watches floating clouds outdoors; When CCTV news arrives, close your eyes and listen to rest.
Wash your face in the middle of haishi, and enter the painting screen in your childhood dream; one of the 12 two-hour periods of the day
? When you are ugly, you wake up for a while, and you are full of blood and blood. The veins are smooth, the heart is like water, and I sleep until the golden rooster crows.
Baidu Encyclopedia-Time