Shui chi le cai hong?

Sinopse

The rainbow was sliced in half by a kite string, and fell into the water where it was eaten by a fish, which was eaten by a duck, which laid a rainbow egg ... Oh! A snake has eaten the rainbow egg and touched an old withered tree from which grew rainbow fruit on which appeared a rainbow caterpillar. Where does the rainbow go from there? What does it change into?