郑国渠

zhèng guó qú

Zhengguo canal, a 150 km long irrigation canal in Shaanxi built in 264 BC

zhèng

abbr. for Zhengzhou 鄭州|郑州[Zheng4 zhou1], the capital of Henan

guó

country; nation; state

(artificial) stream; canal; drain; ditch (CL:條|条[tiao2])