The Shuangliao–Nenjiang Expressway (Chinese: 双辽–嫩江高速公路), designated as G4512 and commonly referred to as the Shuangnen Expressway (Chinese: 双嫩高速公路), is a partially completed expressway in China. It is a major north–south expressway that when complete, will connect the cities of Nenjiang City, in Heilongjiang, with Shuangliao, in Jilin, near the border with Inner Mongolia.
History
This expressway has formerly been wrongly signed using the NTHS-like code "G47."
References

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