How are the years in history divided, such as non-Chen years?

Chronology of trunk and branch is a kind of chronology in ancient China. That is, the twelve branches of A, B, C, D, E, Ji, G, Xin, Ren and Gui are combined in chronological order. Such as Jia Zi and Yi Chou, will return to Jia Zi after 60 years. It goes on and on. The traditional chronology of our country still follows the chronology of cadres and branches.

Conversion between AD 1 age and chronology of trunk and branch: First, the heavenly stems and earthly branches are numbered as follows:

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4 5 6 7 8 9 0 1 2 3

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4 5 6 7 8 9 10 1 1 0 1 2 3

If you want to convert the year of A.D. into a branch year, use the mantissa of A.D. to find the corresponding one ... Then, divide the year by 12 and use the remainder to find the corresponding branch. In this way, the year of A.D. was converted into the year of dry support.