Part of the Classic of Mountains and Seas, part of the history of mythology. Why is the ancient "Shan Hai Jing" so bizarre? Because it doesn't describe the Earth!
Rather, it is a world that once existed, but has become torn apart. Nuwa mended the sky, Jingwei filled the sea, Hou Yi shot the sun, and Dayu controlled the floods. These are not just myths, they may come to the world again!