What is the chronology of cadres and branches?

There is a creation in the ancient calendar of our country, and the year, month, day and time are marked by 10 and 12 earthly branches. Trunk means trunk and branches. It is a symbol used by the ancients to express order, and it is the general name of heavenly stems and earthly branches.

The numerical order of "Tiangan" is 10:A, B, C, D, E, F, G, Xin, Ren and Gui; "Dizhi" has 12 numbers: Zi, Ugly, Yin, Mao, Chen, Si, Wu, Wei, Shen, You, Xu and Hai.

Heavenly stems and earthly branches was widely used in ancient China. For example, 12 is used to measure time, and one day is divided into 12 days, one day is equal to 2 hours, the sub-time (from 1 1 pm to the next day 1 pm), and 1 pm to 3 pm is ugly time. The ancients also matched 12 for animals with 12 hours according to the law of animal infestation time.