Did the beast in Shan Hai Jing really exist in ancient times?

The book Shan Hai Jing itself is very controversial. Some people say it is a myth (or a book of alchemists), some people say it is a book that records global geography, and some people say it is a book that records human prehistory. But why is there this book? Who wrote this book? It is still a mystery.

There are more than 400 kinds of monsters recorded, some of which should be legends handed down from generation to generation and recorded by later generations. Some scholars believe that the god beast in Shan Hai Jing is the product left by the nuclear radiation of the last civilization. For example, there is such a monster in Beishan Jing, "a rabbit shaped like a mouse's head is called a flying mouse because it flies on its back." After reading this, I wonder if you will establish an image in your mind? An animal that looks like a rabbit has a mouse face, but it even has a pair of flying wings. It sounds ridiculous, but is it an animal that mutates under nuclear radiation? The brain hole is too big, I can't stand it either, hehe!

Personally, I think there must be a god beast, and our paranoia about "seeing is believing" makes us easily deny many unheard-of facts. There are many descriptions similar to "hexapod", "Kyubi no Youko" and "three wings", because this shape of animals does not seem to conform to the normal state, so we think that if the authors at that time were all fictional, it would be even more brain-burning! Is the brain hole a black hole? In fact, looking back at our lives, this kind of news about animals is also about dragons!

So I personally think that some of them are true, and some of them are passed on by word of mouth. Shan Hai Jing is very extensive and profound. I am also studying one or two of them, but my brain is not enough!