The ancients believed peachwood could ward off evil, so they painted pictures of the brothers on peachwood boards and hung the boards up over their doors for protection.
古人迷信桃木是王木之精的仙木，味辛氣惡，能伏邪氣、制百鬼，所以在桃木板上畫神荼、鬱壘二神像，張掛在大門上，做為鎮邪驅祟之用。