During the Qing Dynasty, Hulunbuir was part of Heilongjiang province. The 1858 Treaty of Aigun established today's approximate Sino-Russian border, at a great loss to Heilongjiang's territory. In 1901, the Chinese Eastern Railway linked Hulunbuir to the rest of northeast China and to Russian Far East. From 1912–1949, during the Republic of China period, Hulunbuir was part of Xing'an and Heilongjiang provinces. A treaty between the Russian Empire and the ROC on November 7/October 24, 1915 designated Hulunbuir a "special" region under direct subordination to the Central Government of China, but in practice Russia had partial control over day-to-day administration. In 1929, the Soviet Union broke this agreement and invaded Hulunbuir. After the Japanese invasion of China, Hulunbuir became part of the Japanese puppet stateManchukuo, which was not recognized by the Chinese. In the Chinese Civil War, the Communist Party of China gained the support of Inner Mongol leaders like Ulanhu by promising the irredentist expansion of Inner Mongolia into areas that had majorities of Han and Manchu peoples. After the 1949 Communist revolution, Hulunbuir was annexed into Inner Mongolia, but the region kept economic ties to the rest of the northeast via the Chinese Eastern Railway. During the Cultural Revolution, the parts of historical Manchuria inside Inner Mongolia were briefly restored to their original provinces; Hulunbuir was given back to Heilongjiang from 1969 to 1979. Until October 10, 2001, Hulunbuir was administered as a League. The area is and had a population of 2.710 million in 2004, while the gross domestic product was RMB 21.326 billion. The jurisdiction area of the city is larger than all but 8 Chinese province-level divisions, although the actual urban agglomeration is just a very small part of the region, and the average population density of the area is very low.
Names
The city was once a league of Inner Mongolia, until 10 October 2001. During the Qing Dynasty, it was known in Mandarin as Hūlúnbùyǔ'ěr.
Administrative subdivisions
Hulunbuir is divided into 13 different county-level jurisdictions: one district, five county-level cities, four banners and three autonomous banners.
Geography and climate
Hulunbuir itself has a humid continental climate. Winters are long, very dry and severe, due to the semi−permanent Siberian High, while summers are short, though very warm, and rather wet, due to the East Asian monsoon. At Hailar, the monthly 24-hour average temperature ranges from in January to in July, while the annual mean is. With at least 55% of possible sunshine in all months and an annual total greater than 2,700 hours, sunny weather dominates year-round. Approximately 70% of the annual rainfall occurs during the three summer months.