Yin-Yang is the fundamental concept of Taoism, and the guiding principle of Chinese philosophy. It is deep rooted in Chinese science, medicine, astrology, calendar, Feng-Shui, martial arts, and many more.
Yin is the black area of the Yin-Yang symbol, means overcast or negative literally. Yang is the white area of the symbol, means sunlight or positive literally. Yin-Yang represents opposite qualities or traits in all phenomenon and beings. For example, Yin represents dark, cold, negative, empty, even number, female, etc. Yang represents light, hot, positive, full, odd number, male, etc.
The entire circle symbolizes Tai-Chi, the universe. In summary, Yin- Yang concept is that everything in nature has two opposite aspects, they are intertwined and bonded, their force induces and complements each other’s existence, and they keep each other balanced and in harmony