The Songhua River (Chinese:松花江；pinyin:sōnghuājiāng) is a river in Northeast China, and is the largest tributary of the Heilong River (Amur), flowing about 1,927 km from Changbai Mountains through the Heilongjiang and Jilin provinces. The river drains 212,000 square miles of land. It joins the Amur at the town of Dongjiang. The river has a dam at Fengman, which is used for hydroelectricity production. It forms a lake that stretches 62 km upstream. Below the dam, the river flows northwest until its largest tributary, the Nen River, joins it near Da'an. The Nen River drains the northern Manchurian Plain. The river travels east until it joins the Hulan River near Harbin. Then it passes between the northern end of the eastern Manchurian mountain system and the Lesser Khingan Range. The river then flows into the Amur River valley.