Bayantu'men (, Rich tumen), also Tsagaanders () is a sum (district) of Dornod Province in eastern Mongolia. Name "Bayantu'men" was in use for Choibalsan city (before 1941), the railway station and mine in the NE outskirts of Choibalsan city have name of Bayantu'men also. In 2009, its population was 2,006.Dornod Aimag Statistical Office. 2009 Annual Report
Geography The district is separated into the east part and west part, in which the Choibalsan City is located in between separating them.
Administrative divisions The district is divided into four bags, which are: Jargalant Khotont Tsagaan Ders Ulziit Bag
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