Mysterious Recovery: I Know Everything

"My name is Fang Jing. When you read this sentence, I succeeded and failed. I succeeded in going back to the past, but turned into a piece of human skin..." A strange undead ghost, a person who exists in the future, this is a story before the existence of human skin. [The origin of human skin paper, the world before Yang Jian restarted, the identity of the huge black shadow...] [Another world line, the second option besides becoming a god. [Mysterious recovery fan.