Xunhe
The Xun, also called the Sun Bira, runs east through the hills south of the Amur and joins that river near its middle course. Its tributaries drain the forested Lesser Khingan. Oroqen communities along the rivers of this country used local names for themselves, including Bilarchen. Under Qing administration hunters who remained in the mountains supplied sable pelts as tribute, while others were enrolled for service in the Buteha banners.