There is a folk legend that an evil monster in the form of a carp lived in nearby Liyutan (Carp Lake). The legend has it that Kuan Kung killed the monster by hacking off one of these poisonous vines and throwing it in the swamp, killing the monster and keeping the people from harm.
民間傳說從前鄰近的鯉魚潭有鯉魚精作怪，關公「路見不平，拔刀相助」，把關刀一揮，砍下一叢魚藤，丟到潭裡把鯉魚精毒死，為民除害。