The Classic of Mountains and Seas was a book of myths and legends in ancient China. It was written by many people. It was said that it was originally written by the Zhou Dynasty's geomographers, immortals, Taoists, geomographers, writers, etc. The four prehistoric beasts recorded in it were: The Kun Peng, also known as the Giant Bird, was the most famous prehistoric beast in the Classic of Mountains and Seas. It had a huge appearance, and its wings could reach tens of thousands of miles. It could fly at an extremely fast speed and soar freely in the air. The Kun Peng's feathers were black, and its body was huge and powerful. 2. Turtle-Snake, also known as Gui Ling or Snake God, was another relatively famous prehistoric beast. Turtle-snakes usually transformed into human forms, possessing extraordinary wisdom and superb spiritual power, and could cast various spells and skills. 3. Mandrill, also known as ghost soldier, ghost is another creature described as having extraordinary abilities. The mandrill was dozens of feet long and could emit powerful spiritual energy waves with its spear. The Mandrill usually appeared in the wilderness and deep valleys, and was an important threat to some evil forces. 4. Demons and Wangliang, also known as demons and ghosts, were some of the more mysterious prehistoric beasts. Demons and monsters are usually ugly in appearance and strange in behavior. They are good at transformation and invisibility. They can cast all kinds of witchcraft and magic. They are important tools for some evil forces. In the Classic of Mountains and Seas, demons and monsters were often described as terrifying monsters and devils.