It rises in the southeast flank of Mount Hua in Shaanxi province and flows east into Henan province, where it eventually joins the Yellow River at the city of Gongyi.
The river's total length is 420 kilometres (260 mi).
Although not a major river by most standards, it flows through an area of great archaeological significance in the early history of China.
Principal cities or prefectures located on the river include Lushi, Luoning, Yiyang, Luoyang, Yanshi, and Gongyi.
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