Tradeetionally, Hulunbuir wis a pairt oManchurie, an the eastren pairt o the aurie wis kent as Barga. Frae 1912-1949, during theRepublic o Cheenae period (ROC), Hulunbuir wis pairt oXing'an anHeilongjiang province. Durin theJapanese occupation o Cheenae, Hulunbuir wis annexed intae the Japanesepuppet state oManchukuo, but the ROC did no recognise this development as legal. In theCheenese Ceevil War, theCommunist Pairty o Cheenae gained the support o Inner Mongol leaders likUlanhu bi promisin theirredentist expansion o Inner Mongolie intae auries that haed majorities oHan anManchu fowk.[1] Efter the1949 Communist revolution in Cheenae, Hulunbuir wis annexed intaeInner Mongolie, but the region kept economic tees tae the rest o Manchurie via theChinese Eastern Railway.[2]
Durin theCultural Revolution, the pairts o historic Manchurie inside Inner Mongolie wur briefly restored tae thair oreeginal provinces; Hulunbuir wis gien back tae Heilongjiang frae 1969 tae 1979.[2] Till October 10, 2001, Hulunbuir wis admeenistered as aLeague. The aurie is263,953 km2 (101,913 sq mi) an population 2.710 million as o2004, while thegross domestic product wisRMB 21.326 billion. The jurisdiction aurie o the ceety is actually lairger than mony Cheenese provinces (an 42U.S. states), an Hulunbuir is recognizit as thelairgest ceety in the warld bi aurie, awtho the actual urbanagglomeration is juist a vera sma pairt o the region, an the average population density o the aurie is vera law.