third century BCE) was a Chinese hydraulic engineer who lived towards the end of the Warring States period.
During the construction phase, the Qin state discovered Zheng Guo's ulterior motive in asking them to build the canal, and wanted to execute him.
"[2][3] The Qin state agreed and ordered him to finish building the canal.
Once completed, the canal and its irrigation works largely boosted agricultural productivity in the Qin state.
[4] In manga Kingdom, he was referred as "The man who solved the Qin problem of flooding".