Go Back to the Old Days and Be a Taoist Priest

I had just bought a secret book from a street stall, and when I was about to go home, a truck suddenly hit me. The pain I imagined did not come, but I ended up in a strange place in the blink of an eye. A young man who does not belong to this era comes to a strange place with a torn yellow book. How should he survive in this strange era? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.