The Dumb Doctor's Stroke of Genius

This foolish doctor is actually the reincarnation of the chief genius disciple of the Medicine King Valley in the Immortal Realm. Now that his memories have returned, old grudges and grievances surge into his heart. Anyone who ever crossed me won't get away. I'm a genius among geniuses, but for now I need to keep my head down and behave. Does anyone know how? Asking online. It's urgent.