There is a "primordial universe" Wuji (philosophy), and Hongjun Laozu, water or qi.[33][34] It transformed into Taiji and multiplied into everything.[35][36] The Pangu legend tells a formless chaos coalesced into a cosmic egg. Pangu emerged (or woke up) and separated Yin from Yang with a swing of his giant axe, creating the Earth (murky Yin) and the Sky (clear Yang). To keep them separated, Pangu stood between them and pushed up the Sky.