Although Kuan Sheng is described in Outlaws of the Marsh as a direct lineal descendant of King Wu-an the Righteous and Brave (Kuan Yu) of the late Han Dynasty, as similar to his ancestor in appearance and as using a black-dragon crescent-shaped halberd like his, he and Kuan Yu shouldn't be confused as the same person.
此關勝雖在水滸傳一書中稱之為：漢末三分義勇武安王嫡派子孫，生得規模與祖上雲長相似，使一口青頭偃月刀，小說中描述雖與關羽相似，但不可混為同一人。