Northeast China (simplified Chinese: 东北; traditional Chinese: 東北; pinyin: Dōngběi) is a geographical region of China. It usually corresponds specifically to the three provinces east of the Greater Khingan Range, namely Liaoning, Jilin, and Heilongjiang, but historically is meant to also encompass the four easternmost prefectures of Inner Mongolia west of the Greater Khingan. The heartland of the region is the Northeast China Plain, the largest plain in China, with an area over 350,000 km2 (140,000 sq mi). It is separated from Russian Far East to the north by the Amur, Argun, and Ussuri rivers; from Korea to the south by the Yalu and Tumen Rivers; and from Inner Mongolian to the west by the Greater Khingan and parts of the Xiliao River.
|• Total||791,826 km2 (305,726 sq mi)|
Due to the shrinking of its once-powerful industrial sector and decline of its economic growth, the region is often referred to as the Rust Belt in China. As the result, a campaign named Northeast Area Revitalization Plan has been launched by the State Council of the People's Republic of China, in which five prefectures of eastern Inner Mongolia, namely Hulunbuir, Hinggan, Tongliao, Chifeng and Xilin Gol, are also formally defined as regions of the Northeast.