the ancient six calendars. Scholars from the 11th century to 20th century thought that the Qin and Han calendar was either the Zhuanxu calendar or the Yin calendar. However, an archeological discovery in 1972 shattered this view.</p>

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<p>Before I go on, it is useful to introduce a notation to label the years in the Chinese calendar. Even though a Chinese year does not coincide with a year in the Western calendar, it is possible to establish a simp