The Manchurian River is a major river system in East Asia, consisting of the Yalu, Amur, and Liao rivers. The Yalu River is a river that forms part of the border between North Korea and China. The Amur River is the longest river in the Russian Far East, forming the border between Russia and China. The Liao River is a major river in northeastern China, flowing through the provinces of Liaoning and Jilin. Together, these three rivers form the Manchurian River system.