Duse Alin Range

The Duse Alin Range adjoins the Amgun basin, a broad river country lying behind the mountains of the lower Amur region. The Amgun runs for 723 kilometres and drains about 55,500 square kilometres. It begins where the Ayakit and Suluk meet, receives its principal tributary, the Nimelen, and then flows northeast to join the Amur from the left, 146 kilometres above that river's sea outlet. The range and the basin are tied by this water system, which carries meltwater and forest streams toward the larger Amur artery.

The river supports taimen, humpback salmon, sturgeon, and carp, turning the valley into a corridor for fishing as well as travel. Above the river, the Duse Alin terrain is cold and sparsely vegetated; the valley offers a contrasting ribbon of water, fish, and movement through that severe country.

Chinese records knew the Amgun as the Xinggun River, and Tyr at its mouth served as a Chinese fort during the Ming and Qing dynasties. The river thus connected a mountainous interior with wider routes across Manchuria and the lower Amur.