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Where does the upper Amur River end?

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Topographic map of the Amur River basin and its drainage network, covering parts of northeastern China, eastern Russia, Mongolia, and North Korea. The map uses color shading to indicate elevation, shows major rivers and tributaries, surrounding mountain ranges, swamps, marshes, and lakes, and includes a locator inset of the region within Asia. Major cities, railways, and dams are also marked. — Amur River The Amur River basin and its drainage network.

The upper Amur River begins at the confluence of the Shilka and Argun rivers and ends at the mouth of the Zeya River, located near the Siberian city of Blagoveshchensk. This section of the river spans approximately 560 miles (900 km).1