Transmigrating to the Northern Song, Exiled to Changbai Mountain by My Own Brother

Li Yan transmigrates to the Northern Song Dynasty and becomes the second son of a wealthy merchant family. At first, all he wants is to lie flat and coast through life. But his illegitimate elder brother sets him up and has him cast into a desolate wasteland beyond the frontier. Years later, Li Yan returns from the northern border, single-handedly preventing the Jingkang Disaster and saving the Great Song.