He was originally Zhinu, the son of Zheng Kuaiduo, the Imperial Heavenly Supervisor of the Great Yong Kingdom. He suffered a blood feud overnight.After ten years of forbearance and study, Zhinu returned to the capital under the pseudonym Zanghai (played by Xiao Zhan), and rose up the ranks in the court by virtue of his construction skills and the skill of manipulation.He made the truth about the family extermination public to the public and avenged his injustice. As he gradually grew up, he saw the bad habits of the court.In the end, for the sake of national stability and the people's livelihood and contentment, Zanghai assisted Dayong in ending the war.