Ding Wei is one of the main branches, and this order is the 44th. The former is Bingwu, and the latter is Wushen. On the five elements of yin and yang, the heavenly stems and earthly branches belong to the fire of yang, which is a good ratio. The ancient Chinese used these 60 pairs of branches to represent the serial numbers of year, month, day and time, and this is the chronology of branches.
Extended data
The so-called lunar calendar year, that is, trunks and branches are literally equivalent to trunks and branches. In ancient China, the sky was dominant and the earth was subordinate. The connection between the sky and the trunk is called heavenly stems, and the connection between the ground and branches is called earthly branches. Together, it is called heavenly stems and earthly branches, or "dry branch" for short.
There are ten heavenly stems, namely A, B, C, D, E, Ji, G, Xin, Ren and Gui, and twelve earthly branches, namely Zi, Ugly, Yin, Mao, Chen, Si, Wu, Wei, Shen, You, Xu and Hai. The ancients put them together in the order of Jiazi, Ugly B and Bingyin (that is, the sky turns six times and the earth turns five times, which is just a cycle). There are 60 pairs of Jiazi to Guihai, which are called Jiazi.
Baidu Encyclopedia-Ding Weinian