They Called It a Fair Duel and Broke My Chest, Not Knowing the Man Who Woke Up in It Was Not Me

A rigged duel on the Jingtian Division sparring stage left Gu Chen three days from dead, and the man who opened his eyes in that body had already died once in another world and came back with a panel only he can read, one that turns a dead demon's soul crystal into years of cultivation. One point, one year, and a boy who could not stand up starts climbing a ladder grown masters spend their whole lives on, while the uncle who raised him stays exactly where his enemies can reach. Cultivation, reincarnation, a LitRPG system, an OP MC and a demon-hunting bureau inside a five-hundred-year-old dynasty that is quietly running out of time, in a full manhua recap, part one. Two empires are watching him now, so how long before one of them sends something he cannot beat?