shan hai jing (Chinese classic).A Chinese bestiary,chinese painting style.dang kang,"The Classic of Mountains and Seas - The Four Classics of the East" records: "There is a beast, whose shape is like a dolphin and has teeth, its name is Dangkang, and its singing is self-sounding, and when you see it, the world is big." ) When Kang is also called Yagu, like a little pig, but with long teeth, its cry is its name, and when it appears, the world will have a good harvest.