The water engineer from the state of Zheng who was sent to Qin to build a canal, intending to weaken Qin. His scheme was discovered but the canal later proved highly beneficial for Qin's agriculture. He is mentioned as a historical figure whose exposure triggered the expulsion of retainers. He does not appear in person but is crucial to the background of the plot. Qin ultimately pardoned and utilized his contribution, as history records. His affair directly leads to Zhou Wenqing’s crisis and the King of Qin’s new policy.
