What is the nail in the hundred-year-old nail?

Jiazi is a chronology, collectively referred to as sixty flowers, that is, a cycle of sixty years. It is a combination of ten-day stems and twelve branches.

Jiazi is one of the main branches [1], and the order is 1. The former is guihai, and the latter is ugly. In the traditional calendar of China, the first year of a cycle is called "Jiazi Year". In the following AD years, if the number of years divided by 60 is greater than 4, or the number of years is reduced by 3, the remainder after division by 10 is 1, and the remainder after division by 12 is 1. The year from the first day of the first month of that year to the New Year's Eve of the following year is the year of Jiazi. [2] On the theory of Yin-Yang and Five Elements, the heavenly stem belongs to the wood of Yang, and the earthly branch belongs to the water of Yang, which is aquatic wood. Common in geomantic omen, dialects, etc. , originally a religious term. In some ancient literary works, it is a metaphor for a disease, such as Tale of Genji [3] and Rashomon. Description: Appearance: Tooth marks on both sides of the tongue, abnormal crawling sensation of muscles, pain and night sweats. It's physical. In ancient times, it was thought that this was related to the five elements, and it was one of the secret methods of Yin and Yang studies. The ancients believed that by adding the three vows of "Four Spirits, Shura and torii Ming Dynasty" to the teeth of the black owl, it was possible to get rid of the predicament and seek wealth. Taiwan Province Province, Hongkong, Singapore, South Korea and Japan also have this custom of yin and yang and five elements.