Argun

Argun River noun a river in eastern Asia that arises in China and flows northeast along the border between China and Russia to become a tributary of the Amur River
Found on https://www.encyclo.co.uk/local/20974

Argun

Argun (är'gOOn') , Mandarin Ergun, river, 950 mi (1,529 km) long, rising in the Da Hinggan Mts., Heilongjiang prov., NE China, as the Hailar River and flowing W to the Russian border, then NE along the Russian-China frontier, where it joins the Shilka River to form the Amur. The Chinese...
Found on http://www.infoplease.com/ce6/world/A0804657.html
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