郑国渠 / Zhengguo Canal
郑国渠 / Zhengguo Canal enters the wiki through 《资治通鉴·秦纪》104｜阴谋失算让秦国版图又又又膨胀了 as the canal that 韩国 wants 秦国 to build in order to exhaust Qin resources. The episode describes the project as drawing Jing River water eastward through the Guanzhong region toward the Luo River system, with the practical aim of improving irrigation.
The canal becomes the episode’s main historical irony. Although 郑国 is sent with a delaying motive, 吕不韦 already wants Guanzhong waterworks as a foundation for Qin’s future wars. Once completed in 236 BCE in the source’s chronology, the project enriches Qin agriculture and is named after Zheng Guo.
《资治通鉴·秦纪》110-1｜李斯：米仓老鼠和下水道老鼠你怎么选？ adds the canal’s court-politics afterlife. Its exposed hostile origin helps make foreign technical expertise look dangerous, even though the earlier source emphasizes that Qin keeps and benefits from the project.