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Where does the Tumen River flow?

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The Tumen River originates on Mount Paektu in the Changbai Mountains along the border between China and North Korea. It serves as a northeastern frontier, forming the boundary between North Korea and both China and Russia.12

The river flows northeastward along the Changbai range before turning southeast to empty into the Sea of Japan (East Sea). Throughout its course, it travels through mountainous, heavily forested districts and narrow gorges.13