The Chinese philosophy is also the philosophy of ”generative generation”, and the origin of the concept can be traced back to the Dao De Jing, where the term 'generation' is obscure but significant. This essay would like to expound this concept by appealing to three concepts: ”being”, ”non- being”, ”return to Dao”. After thinking over these concepts, I can understand that the concept of ”generation” is not only applied to cosmology, but also to ontology and the doctrine of self cultivation. By revealing this obscure but crucial concept, we can unify all the equivocal meaning of different concepts with reference to it.