What are people's five days and five elements?

"Yin Na's five elements theory of Yin and Yang, the heavenly stems and nonyl belong to Yang's water, and the earthly branches and noon belong to Yang's fire, which belongs to fire and water. Yin Na's five behaviors on Renwu Day are willows.

In the ancient calendar of China, A, B, C, D, E, Ji, G, Xin, Ren and Gui were called "ten heavenly stems", while Zi, Ugly, Yin, Mao, Chen, Si, Wu, Wei, Shen, You, Xu and Hai were called "twelve earthly branches". They cooperate with each other in a fixed order, with a total of 60 pairs of combinations, forming the method of chronology, calendar, calendar and calendar. It is said that the calendar of Shang Dynasty is the greatest achievement of the Ganzhi calendar and the longest used calendar in the world. From February of the third year of Lu Yingong in the Spring and Autumn Period (720 BC) to the third year of Xuantong in the Qing Dynasty (A.D. 19 1 1), there are textual researches.

Calendar year, calendar month, calendar day and calendar hour are also the basis of ancient China magic numbers, such as Yuan Hai Zi Ping and San Tong Ming Hui.