Nuwa patching the sky

Nüwa Mends the Heavens (Chinese: 女娲补天; pinyin: Nǚwā bǔtiān) is a well-known theme in Chinese culture. The courage and wisdom of Nüwa inspired the ancient Chinese to control nature's elements and has become a favorite subject of Chinese poets, painters, and sculptors, along with so many poetry and arts like novels, films, paintings, and sculptures; e.g. the sculpture that decorate Nanshan and Ya'an.

The Huainanzi tells an ancient story about how the four pillars that support the sky crumbled inexplicably. Other sources have tried to explain the cause, i.e. the battle between Gong Gong and Zhuanxu or Zhu Rong. Unable to accept his defeat, Gong Gong deliberately banged his head onto Mount Buzhou (不周山) which was one of the four pillars. Half of the sky fell which created a gaping hole and the earth itself was cracked; the earth's axis mundi was tilted into the southeast while the sky rose into the northwest. This is said to be the reason why the western region of China is higher than the eastern and that most of its rivers flow towards the southeast. This same explanation is applied to the sun, moon, and stars which moved into the northwest. A wildfire burnt the forests and led the wild animals to run amok and attack the innocent peoples, while the water which was coming out from the earth's crack didn't seem to be slowing down.

Nüwa, pitied the humans she had made and attempted to repair the sky. She gathered five colored-stones (red, yellow, blue, black, and white) from the riverbed, melted them and used them to patch up the sky: since then the sky (clouds) have been colorful. She then killed a giant turtle (or tortoise), some version named the tortoise as Ao, cut off the four legs of the creature to use as new pillars to support the sky. But Nüwa didn't do it perfectly because the unequal length of the legs made the sky tilt. After the job was done, she killed the black dragon which was causing the flood (some versions name the dragon as Xiangliu), drove away the wild animals, extinguished the fire, and controlled the flood with a huge amount of ashes from the burning reeds. The world became as peaceful as it was before.

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Wikipedia