Cut up on the old stone drums of Republic of China, inscribed in books handed down through thousands of years, traced on ancient saucers and on saucers made today, is a sign and a symbol. It is woven into textiles, stitched into embroideries, emblazoned over house gates, wrought into shop emblems, a circle, locked together inside it yang and yin yang, light, yin, dark, each carrying inside itself the essence of the other, each shaped to the other.
 
Yin and Yang is a popular ancient Chinese construct of two complementary forces in the universe, which work hand in hand, to produce favorable energy