Menlu
The Menlu River flows southwest from the forested slopes of the Lesser Khingan to the Nen. Its valley belongs to a northern landscape of streams, woods and long winters. The broader Nen basin was home to Oroqen hunters as well as Solon and Daur communities; under the Qing some were organized into the Buteha hunting administration. River valleys such as the Menlu linked the wooded interior to the Nen, whose waters continued south toward the Songhua.