Abstract

The discovery of Hengxian and the formation of the category of hengxian are an important recapitulation and creative integration of the theory of the ontological Dao in the Pre-Qin period. The cosmology of "self-creating and self-functioning" in Hengxian and the theory of "self-creating and self-evolving" in Liezi and Zhuangzi can be mutually interpreted. It indicates that the theory of transformation of qi entered a quite mature state in the Warring States Period.