Bayandun ( "rich ocre") is a sum (district) of Dornod Province in eastern Mongolia. It is named for the local mountain with natural formations located in its territory, In 2009, its population was 2,936.Dornod Aimag Statistical Office. 2009 Annual Report
Administrative divisions The district is divided into four bags, which are: Khairkhan Naran Turgen Yargai
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