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Among the sixty Jiazi, Yihai is at the position of 12, the former is JOE, and the latter is Bingzi. Born in the year of Yihai, it is called Yihai Nianzhu, Yihai Zhu Yue, Yihai Rizhu and Yihai Shizhu.

60-year-old Jiazi is an ancient invention of China people, also known as 60-year-old Jiazi. Its earliest uses are calendar year, calendar month, calendar day and calendar time.

Calendar year is 60-year cycle, calendar month is 5-year cycle, calendar day is 60-day cycle, and calendar time is 5-day cycle.

Sixty Jiazi also refers to the sixty-star gods of Taoist belief, that is, sixty gods on duty every day. Use heavenly stems and earthly branches's collocation as the name to call these gods.

Heavenly stems and earthly branches Sixty Jiazi 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".

In ancient China, people used heavenly stems and earthly branches to represent years, months, days and hours. Year, month and day are like four pillars supporting the building of time, so they are called four pillars.

The ancient people in China formulated heavenly stems and earthly branches Theory, which should be based on observation and practice, rather than the concept of behind closed doors. For example, acupuncture in traditional Chinese medicine pays attention to the circulation of meridians, and the selection of points is regular at different days and hours, which conforms to heavenly stems and earthly branches's law.