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The Yuan or Yüan River (Chinese: 沅江, p Yuán Jiāng or 沅水, Yuán Shuǐ) is one of the four largest rivers in Hunan province in southeast-central China. It is a tributary of Yangtze River. It is 864 kilometres (537 mi) long and rises in Guizhou province in the Miao Mountains near Tu-yün and is navigable. The upper stream is called the Lung-t'ou River, and downstream it is called the Qingshui ("Ch'ing-shui") River. It becomes the Yuan River after its confluence with its northern tributary, the Wu River.
After its merger with the Wu River, the Yuan flows in a northeasterly direction, hugging the western side of the Xuefeng Mountains of Hunan. Ultimately, the Yuan flows into the Dongting Lake at Changde and from there into the Yangtze River. The Yuan serves as a major waterway for western Hunan and eastern Guizhou. The Yuan is navigable for large vessels up to Changde, whereas smaller boats can make it to Taoyuan.
- "Yuan River". Encyclopaedia Britannica. Retrieved 20 July 2013.