One of the Three Great Master Craftsmen of the Mohist School, appointed by Empress Jiang Li as the chief official for flood control. He is a master of Mohist mechanical techniques, capable of creating advanced devices to manage flooding. He is only mentioned in the Empress’s court meeting as a strategic appointment. His skills represent the strength of the Mohist School in practical governance. He does not appear personally in the plot but is important to the background of the empire.