东北平原 dōngběipíngyuán Northeast Plain Origin Definitions Defs Strokes Stroke Words Sentences Sents 东北 東北 dōngběi nounproper noun Northeast China The northeastern region of China, historically known as Manchuria, which includes the provinces of Liaoning, Jilin, and Heilongjiang平原 píngyuán plain plain; flatlands; a broad and level area of land