Tai sui is a fictional old star in ancient astronomy, also known as Tai sui or Tai sui. Why should we assume that this is too old? This should start with what the ancients called twelve mornings. The ancients divided the day around the ecliptic into twelve equal parts from east to west, and called it twelve days, which were represented by twelve branches: Zi, Ugly, Yin, Mao, Chen, Si, Wu, Wei, Shen, You, Xu and Hai, but the direction and order were just the opposite of twelve o'clock in the lunar calendar (see the question "What is the lunar calendar" in this book). Dundun, read Dundun; Roe, read zāng stolen goods; Hey, read tūn and swallow; Eunuch, read Y, M, N. Take the Taizi calendar as an example. In the Chu Ci of the Warring States Period, Qu Yuan said, "I am loyal to Meng Xi, but I am loyal to Geng Yin." "Country" is the name of "Country Pavilion", which indicates that Qu Yuan was born in the year of "Tai Sui Zai Yin". "Meng Wei" was built in the first month of Yuchun and the first month of Xiali; "Geng Yin" is the main branch of his birthday. Qu Yuan's birthday happens to be the Lunar New Year. Some critics believe that Qu Yuan was born in the year of "Tai Sui in Yin", which reflects the actual position of the star in the starry sky at that time, which is not the same as the Yin year with abstract symbolic meaning in the chronology of later generations. This understanding is very insightful. In the Western Han Dynasty, Li Jia took ten names, such as Suifeng, Youmeng, Rouzhao, Qiangqiang, Zhu Yong, Titan, Zhang Shang, Shiguang, Xuan Mo and Zhaoyang, and named them Suiyang. From flv convert's film, we know that Tai Sui Chronology was originally created to reflect the sky position of the old star year by year. Because of the existence of "Chen Chao", the accumulation of this chronology of more than 80 years is not in line with the reality of the sky. Therefore, the ancients simply used the 60-year chronology to reflect the course of China's ancient chronology from astronomical observation to abstract symbols. What is the relationship between this course and the chronology of the zodiac remains to be studied. It is worth mentioning that if later historians or writers use those strange names, it is entirely for the sake of antique, which has nothing to do with the actual astronomical phenomena, but based on the comparison of years in a year. Sima Guang's "Zi Tong Zhi Jian" intends to be antique, such as Volume I, Zhou Jiyi: "I started shooting and was trapped for thirty-five years". In other words, there is no other mystery from Wuyin year to Renzi thirty-five years.