The Zhengguo Canal, Zhengguoqu or Chengkuo Canal (simplified Chinese: 郑国渠; traditional Chinese: 鄭國渠; pinyin: Zhèng Guó Qú), named after its designer, Zheng Guo, is a large canal located in Shaanxi province, China. The canal irrigates the Guanzhong plain, north of Xi'an. Together with the Dujiangyan Irrigation System and Lingqu Canal, it is one of the three biggest water conservation projects built before the Qin dynasty in ancient China.[1] The canal connects the Jing river and Luo river, northern tributaries of the Wei River.