Once upon a time, there were no rivers and lakes on earth, but only the Eastern Sea, in which lived four dragons: the Long Dragon, the Yellow Dragon, the Black Dragon and the Pearl Dragon. One day the four dragons flew from the sea into the sky. They soared and dived, playing at hide-and-seek in the clouds.

"Come over here quickly!" the Pearl Dragon cried out suddenly.

"What's up?" asked the other three, looking down in the direction where the Pearl Dragon pointed.

On the earth they saw many people putting out fruits and cakes, and burning incense sticks. They were praying! A white-haired woman, kneeling on the ground with a thin boy on her back, murmured, "Please send rain quickly, God of Heaven, to give our children rice to eat."