Chinese folk art and Chinese philosophy are unified in the belief that yin-yang produces all living things on earth and all living things stay alive through propagation. Originated in  Chinese primitive society, this was the philosophical explanation of human's perception of life and propagation. Chinese ancestor's philosophical conclusion was to "look at oneself up close and other creatures from afar." Observing one's own life in this manner would lead to the understanding of other living things on earth. This conclusion had been the essential cultural understanding of the primitive art to the folk art of the nation.