In the ancient war between the gods, Gonggong was defeated and angrily hit the Tianzhu of Buzhou Mountain, causing a big hole in the sky. The water of the Tianhe River poured down, causing the world to suffer floods. Nuwa loudly refused to bear the suffering of all living beings and practiced the seven-color sacred stone to mend the sky. Unexpectedly, a nine-color sacred stone came out, and she threw it into the lower world.