Aihui District () is an administrative district and the seat of the prefecture-level city of Heihe, Heilongjiang Province, China. It is located on the right (south-western) bank of the Amur River, across which is Blagoveshchensk, Amur Oblast, Russia. Aihui District spans an area of , and had a population of 192,764 as of 2000.
Aihui has undergone a number of name changes throughout its history, including Aihui (), Aihun (), Aihu (), and Aihu (). Most recently, in 1956, the area's Chinese characters were changed from Aihui () to the present Aihui (), due to the uncommon nature of the former name's characters.
The area of present-day Aihui has been occupied on and off by various Chinese dynasties dating back to the Tang dynasty.
To fend off Russian military forces invading the area, Qing dynasty forces were stationed in present-day Aihui in 1683.
In 1685, the city of Aihui () was built on orders from the Yamen of Heilongjiang. In the subsequent two centuries since its founding, Aihui served as one of the most important towns of Northern Manchuria.
Following the Boxer Rebellion the city was briefly occupied by Russia, until 1906 when it was returned to the Qing dynasty.
In 1913, Aihui incorporated as Aihui County ().
From December 1934 to 1945, the city was ruled by the Japanese puppet-state of Manchukuo.
On December 11, 1956, was renamed Aihui County (, pronunciation unchanged). On November 15, 1980, Heihe City was created, and on June 6, 1983, Aihui County was abolished, being merged into the Heihe City.
To further complicate the situation, in 1993 the former Heihe City (a county-level administrative unit) was reorganized into Aihui District (also a county-level unit), while the former Heihe Prefecture () became Heihe Prefecture-level City (which consists of Aihui District and a number of counties). This administrative division has been in effect ever since.
The and the both run through the district. Much of the district is forested, particularly in the west. The primary trees of Aihui District are larch, red pine, poplar, and birch.
The district shares a border with Russia, and faces the Russian city of Blagoveshchensk.
Aihui is divided into 4 subdistricts, 3 towns, 5 townships, 3 ethnic townships, and 23 other township-level divisions.
The district's four subdistricts are (è±åÂÂè¡ÂéÂÂ), (å ´å®Âè¡ÂéÂÂ), (æµ·å °è¡ÂéÂÂ), and (西場è¡ÂéÂÂ).
The district's three towns are (西å²ÂÃ¥ÂÂéÂÂ), Aihui (ç·ç²éÂÂ), and (ç½Â达汽éÂÂ).
The district's five townships are (幸ç¦Â乡), (ä¸Â马åÂÂ乡), (å¼ å°èÂ¥åÂÂ乡), (西峰山乡), and (äºÂç«Â乡).
The district's three ethnic townships are (Ã¥ÂÂÃ¥ÂÂÃ¥ÂÂ满æÂÂ乡, ), (å¤河达æ¡å°ÂæÂÂ满æÂÂ乡, ), and (æ°çÂÂéÂÂ伦æÂ¥æÂÂ乡).
The district also has 23 other township-level divisions, which include mines, farms, forestry areas, and other similar operations which have township-level status.
About 18,500 persons (9.4% of the entire population) belong to ethnic minorities. Aihui is home to 26 different ethnic groups, including Han Chinese, Manchu, Hui, Daur, Oroqen, Korean, and Mongol populations.
As of the 1990s, the village of Dawujia (), located in the district, remained one of the few pockets where the Manchu language was commonly spoken.
The district is home to proven reserves of 69 different types of minerals. Proven coal reserves total 1.1 billion tons, proven gold reserves are 80 tons, proven silicon reserves are 1 million tons, and proven limestone reserves total 12 million tons. There are also sizable reserves of marble, basalt, perlite, and quartz sand.
National Highway 202 runs through the district, as does the Bei'an-Heihe railway.