Secret: I Have an Old Library

Gu Huai, the time traveler, replaced the night watchman of Tingen City, a civilian employee who died in an extraordinary accident. There is a library shrouded in gray fog deep in the consciousness. The first level contains all the "ordinary books" he read in his previous life - including the original "Lord of Mysteries". But all content involving mystery, extraordinary, and the future is encrypted by gray mist. Only when he personally comes into contact with the corresponding characters, potions, or events, the relevant "book pages" will be unlocked.