What Will Eat Human In Future?

— Dinghchao, you know there are more and more people in the world, and our lives become more and more competitive, what's your opinion about such phenomenon?

— I don't worry about it at all. You know, when there are too many rats in the world, cats will eat them; when there are too many cats in the world, we human will kill them; when there are too many people in the world, something else will destroy us. Please don't worry about it, just mind your current life.

— Oh, my god! Dingchao, are cold-blooded?

— No comment.