What kind of river is the Amur river?

The length of the Amur (Heilongjiang) is 5,498 km (3,417 miles). It is the 8th longest river in the world.

SOURCE: S. Liu, P. Lu, D. Liu, P. Jin, W. Wang, Pinpointing the sources and measuring the lengths of the principal rivers of the world, International Journal of Digital Earth, Volume 2, Issue 1 March 2009 , pages 80 - 87,DOI: 10.1080/17538940902746082