The data is the administrative division of Songliao Basin.
Songliao basin generally refers to the northeast of China.
The administrative divisions include Liaoning, Jilin, Heilongjiang provinces,
four League (cities) in Eastern the Inner Mongolia Autonomous Region,
and the part of Chengde City in Hebei province.
The total area of the Songliao basin is 1 million 238 thousand square kilometers.
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