After flying for thirty thousand miles above the great lake, Wu Qi suddenly saw a huge silhouette appear off in a further distance, on the surface of the water which had now turned dark green. He focused his vision to look at the silhouette. It was a huge, black turtle, whose carapace measured over four thousand miles in circumference, on top of which was a small island.
The turtle had its neck and limbs retracted within the shell, exposing only an about one hundred miles long tail as it floated lazily on the surface of the water. Every now and then, the tail would swing, hitting the water and raising waves that went as high as ten thousand feet. When the waves fell back to the lake, they produced deep, muffled rumbles that sounded like the rolling of thunderclaps, sending a vast amount of mist to as far as several tens of miles away. And when the sunlight shone onto the white mist, a rainbow would stretch across the sky.