Earthly Branches
In Chinese astrology, metal is included in the 10 heavenly stems (the five elements in their yin and yang forms), which combine with the 12 Earthly Branches (or Chinese signs of the zodiac), to form the 60-year cycle. Yang metal years end in 0 (e.g. 1980), while Yin years end in 1 (e.g. 1981). Metal governs the Chinese zodiac signs Monkey