The state of Han hoped the canal would drain Qin's strength. When the plot came out, Zheng Guo told the king that the canal would still serve Qin for ten thousand generations, and he was allowed to finish it. The
郑国渠 watered the plain north of the Wei River and helped make Qin rich enough to unify China. His exposure also set off the order expelling foreign officials that
李斯 answered in
谏逐客书.
