The Sanjiang Plain includes the

Amur River The Amur (russian: река́ Аму́р, ), or Heilong Jiang (, "Black Dragon River", ), is the world's tenth longest river, forming the border between the Russian Far East and Northeastern China (Inner Manchuria). The Amur proper is long ...

(also known as the Heilong, or literally, "Black Dragon" or River), Songhua and

Ussuri The Ussuri or Wusuli (russian: Уссури; ) is a river that runs through Khabarovsk and Primorsky Krais, Russia and the southeast region of Northeast China. It rises in the Sikhote-Alin mountain range, flowing north and forming part of the ...

(also known as the Wusuli) rivers and covers 23 counties in

Heilongjiang Heilongjiang () Postal romanization, formerly romanized as Heilungkiang, is a Provinces of China, province in northeast China. The standard one-character abbreviation for the province is (). It was formerly romanized as "Heilungkiang". It is th ...

Province,

China China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's List of countries and dependencies by population, most populous country, with a Population of China, population exceeding 1.4 billion, slig ...

encompassing about 109,000 km². The area has extensive

wetland A wetland is a distinct ecosystem that is flooded or saturated by water, either permanently (for years or decades) or seasonally (for weeks or months). Flooding results in oxygen-free (Anoxic waters, anoxic) processes prevailing, especially in t ...

References

{{Coord, 48.1667, N, 134.0000, E, source:wikidata, display=title Plains of China Landforms of Heilongjiang