Tumangang-tong (Korean: 두만강동) is a neighbourhood in Sonbong, Rason, North Korea, near the China–North Korea–Russia tripoint^[1] where the borders of the three countries converge. It is also the closest town in North Korea to the border with Russia, being located across the river from the Russian settlement of Khasan and the Chinese settlement of Fangchuancun. The Korea Russia Friendship Bridge connects Tumangang and Khasan and is the sole crossing point on the 17 km (11 mi) long North Korea–Russia border. Trains coming from and going to Russia are handled by Tumangang Station.^[2]

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A train connects the city on the Vladivostok - Rasŏn railway line.

Station linking Russia and North Korea, thanks to a railway bridge crossing the Tumen River. The railway between the two countries was built during World War II to transport Soviet troops and weapons to Korea to fight against Japan. It was also used during the Korean War.

This line is currently little used, with only 10,000 passengers transported in 2005.

In April 2008, Russia and North Korea signed the long-awaited agreement allowing the reconstruction of a railway line to Russia.

42.4216825°N 130.6025505°E / 42.4216825; 130.6025505