清代中期,索伦部南迁嫩江流域之后,其族体形态过程、民族经济过程和民族政治过程均向前发展,索伦部得以分化为鄂温克族、鄂伦春族、达斡尔族三个民族,满洲在此民族分化过程中制定了一些政策,保证了索伦部民族分化过程的顺利发展。 After the southward shift of Nen River basin in the middle of the Qing Dynasty, the ethnic morphology process, national economic process and national political process all proceeded forward. The Solemn Ministry was divided into the Ewenki, Oroqen and Daur ethnic groups, Manchuria In the process of ethnic differentiation, some policies have been formulated to ensure the smooth development of ethnic differentiation in the Solemn Ministry.