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Tumangang Workers' District (Korean: 두만강, Russian: Туманган) is a town in Sonbong, Rason, North Korea. It is the closest town of North Korea to the border with Russia. Tumangang sits on the Tumen River, and across the river is the Russian settlement of Khasan and the Chinese settlement of Fangchuancun. A train connects Khasan with Tumangang and from there to Rason. A road also connects Tumangang and Sonbong.
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