60 hours is a five-day cycle; Recycle it once and then use it, recycle it once and recycle it once. It must be noted that time periods are divided into early time periods (early time periods) from 0: 00 to 1 and late time periods (late time periods) from 23: 00 to 24: 00, so when you meet A or yourself, 0: 00 to 1 is a time period, and 23: 00 to 24: 00 is a time period. Late night is also called midnight or night.

There is also a song that starts from a day: A also adds A, and B is the beginning; Bing Xin started from Wu, and Dingren Gengzi was born; You can't do it, but you can't.

The following table lists the hourly trunks and branches consisting of daily trunks and hourly branches, based on Beijing time (UTC+8):

Extended data:

Among the natural features of the five elements of A, B, C, D, E, Ji, G, Xin, Man and Ghost, A and B carry qi, C carries fire, E carries humidity, dryness and cold, which shows that the qi of the five elements in the sky changes gradually according to the mutual development process of the five elements.

In the five-element characteristics of Zi, Ugly, Yin, Mao, Chen, Si, Wu, Wei, Shen, You, Xu and Hai, it shows that Yin and Mao carry ethos, internal heat and dry gas at noon, Haizi carries cold air, and Chen and Ugly do not carry moisture. It runs with a unique program. The heavenly stem refers to the five qi laws in the sky, and the earthly branch refers to the five qi laws on the ground.

Baidu Encyclopedia-heavenly stems and earthly branches