Renchen time is from 7 to 9 in the morning. Renchen is one of the stems and branches, and is the 29th in the order. The first one is Xinmao, and the last one is Guisi. The 29th year of a cycle in the Chinese lunar calendar is called the Renchen year.
The stems and branches originate from the observation of celestial phenomena in ancient China. The ten stems are: Yan Feng, Zhan Meng, Rou Zhao, Qiang Yu, Zhu Yong, Tu Wei, Shang Zhang, Chong Guang, Xuan Qian and Zhao Yang. . After simplification, the heavenly stems and earthly branches are completed, which are A, B, Bing, Ding, Wu, Ji, Geng, Xin, Ren, and Gui, which are called the ten heavenly stems, and Zi, Chou, Yin, Mao, Chen, Si, Wu, Wei, and Shen. , You, Xu and Hai are called the twelve earthly branches.
The ten heavenly stems and the twelve earthly branches dominate each other and form sixty basic units. The two cooperate with each other in a fixed order, thus forming the stem and branch era method.
The Heavenly Stems and Earthly Branches were mainly used to record the day in ancient China. They can also be used to record the month, year, time, etc. The time notes of stems and branches have been used in ancient China, and it can be said that it has never been interrupted. Therefore, it is very helpful for studying history.
In the ancient book "Feng Wanzhen": "Xianfeng Gengshen, the British and French allied forces invaded the White Sea." It can be seen from this that the application fields of this algorithm are still very wide.