Uncontain

“The four pillars were broken. Heaven did not completely cover the earth; Earth did not hold up Heaven all the way around. Water flooded in great expanses and would not recede. Thereupon, Nüwa smelted together five-colored stones in order to patch up the azure sky, cut off the legs of the great turtle to set them up as the four pillars, and piled up reeds and cinders to stop the surging waters. The azure sky was patched; the four pillars were set up; the surging waters were drained; blameless people lives.” (淮南子 Huainanzi)