Northeast China , historically also known as Manchuria, is a geographical region of China. It consists specifically of the three provinces of Liaoning, Jilin and Heilongjiang, collectively referred as the Three Northeastern Provinces (东北三省, Dōngběi sānshěng), but broadly also encompasses the eastern part of Inner Mongolia. The region is separated from Far Eastern Russia to the north largely by the Amur, Argun and Ussuri rivers, from North Korea to the south by the Yalu River and Tumen River, and from the Inner Mongolian Autonomous Region to the west by the Greater Khingan Range. The heartland of the region is the Northeast China Plain.