Heavenly Stems

The ten Heavenly Stems (天干 pinyin: tian1 gan1) was the numeration of discrete entity as in years and dates often employed in Chinese astrology. Heavenly Stems are associated with Yin Yang (ÒõÑô) and the five elements (ÎåÐÐ). They are matched with the twelve Earthly Branches[?] to form the 60 years cycles of Stem and Branch (干支) in Chinese calendar.