阴阳

"The yin and yang are a kind of dualistic concept derived from ancient Chinese philosophy . In ancient China , the phenomena of opposition and unity in things, such as heaven and earth, sun and moon, day and night, cold and heat, sangmu, up and down, left and right, movement, rigidity, and punishment, were expressed in terms of the concept of “yin and yang”. "Reciprocal and dependent" abstract relationships, and " qi " as a concrete representation of this abstract relationship."
Extracted from Wikipedia (Chinese)