The Yin Yang (Tai Ji) symbol is based on universal energy, ancient Chinese believed that everything in the universe was produced by changes, which resulted from the balancing of Yin (- -) and Yang (+ +).
The Yin Yang (Tai Ji) symbol is the traditional image of Feng Shui.
The white area is Yang (male) and the black area is the Yin or Ying (female).
YIN (- -) represents the female, earth, moon, night, shade, stillness, negative, darkness, softness, moisture, night-time, even numbers and docile aspects of things.
YANG (+ +) represents the male, sky, day, light, activity, positive, brightness, hardness, dryness, day-time, odd numbers and dominant aspects.
YIN and YANG are continually in the state of flux and always looking for Balance, Yin and yang have a complementary relationship. There is always a little Yin in Yang and a little Yang in Yin.