In 1388, the Hongwu Emperor established contact with three tribes of the Ilan Tumen area (the confluence of the Mudanjiang River and the Sungari River), the Odori, Huligai (Hūrha or Hurka) and Tuowen and attempted to enlist them as allies against the Mongols.
Nen River, one of the major tributaries to the Songhua River in Heilongjiang
Below the dam, the Second Songhua flows northwest until its largest tributary, the Nen River, joins it near Da'an and creates the Songhua.