Bao Zheng was a laurel-winner in heaven. He also loved to win laurels frivolously, claiming that he was unrivaled in heaven and earth, so he was demoted to the lower world. After 666 years of dust, he turned into a loyal minister to assist the emperor in every dynasty. However, because he accidentally entered the corpse pool of the corpse-eating demon, he was infected by the corpse skin poison and died in the light. The one who can solve this poison is the exquisite heart of Shiqiao.
Bai Yutang is a dragon-riding rat under Leiyin Temple. He once met Guan Zhegui in the Heavenly Palace and admired him very much. Hearing that Guan Zhegui went down to the lower world, he secretly left the mortal world. Unfortunately, he was thrown into the six realms of reincarnation by Zhong Kui. During the reign of Renzong, he was reincarnated as Bai Yutang, with a delicate heart of ten orifices nurtured by the spirit of heaven and earth.