The fullest surviving version of Pangu's story opens before the world existed in any recognizable form, when heaven and earth were fused together inside a single mass shaped like a chicken's egg, formless and dark. Pangu forms inside that chaos and sleeps within it for eighteen thousand years before waking, at which point he splits the egg apart, in most tellings with a great axe, releasing the clear, light yang element to rise and become the sky and letting the heavy, murky yin element sink to become the earth. Fearing the two might rejoin and collapse back into their original undivided state, Pangu plants himself between them and grows at the same rate the sky rises and the earth thickens, a full ten Chinese feet taller each day, for another eighteen thousand years, until sky and earth are separated by ninety thousand li and can no longer come back together on their own.
Only then, his work complete and his enormous strength finally spent, does Pangu lie down and die, and it is his death rather than his labor that finishes the creation: his breath becomes the wind and the clouds, his voice the rolling thunder, his left eye the sun and his right eye the moon, his four limbs and torso the mountains at the four directions and the center, his blood the rivers, his muscles the fertile soil, and, in some versions of the text, the parasites living on his body become the first human beings, carried by the fleas and lice that fed on him into the newly finished world.