Northeast of China is located in 115º30' ~ 135º30' E, 38º43 ' ~ 53º30' N, the length beween north and south is about 1600 km, the width between east and west is about 1400 km, all of 3 provinces-Liaoning, Jilin, and Heilongjiang and 4 cities-Hulun Buer League, Xing'an League, Zenith (Tongliao City) and Chifeng City are included.
The total area is about 1.24 million square kilometers, of which mountain area is 541,000 square kilometers and accounting for 43.6%, the hills is 326,000 square kilometers and accounting for 26.3% , the plain is 374,000 square kilometers and accounting for 30.1%. In the case of four provinces (autonomous regions), area of Heilongjiang Province is about 454,000 square kilometers and accounting for 36.6%, area of Four East Leagues (citys) Mongolia Autonomous Region is about 450,000 square kilometers and accounting for 36.2%, area of Jilin Province is about 191,000 square kilometers and accounting for 15.4%, area of Liaoning Province is about 146,000 square kilometers and accounting for 11.8%. The topography characteristics of Northeast China are rized by: north, west and east are surrounded by mountains, south is close to Bohai Sea and Yellow Sea, Liaohe Plain, Songnen Plain are in center and south, the northeast is Sanjiang Plain. The northwest, north and northeast of the district are bordering Russia with the Ergun River, Heilongjiang and Wusuli River, the southnorth is adjacent to the Democratic People's Republic of Korea (DPRK) with Yalu River, Tumen River, Changbai Mountain Tianchi, and the western part of People's Republic of Mongolia.
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