|Country||People's Republic of China|
|Township-level divisions||9 subdistricts|
1 ethnic township
|District seat||Huayuan Subdistrict (?)|
|o Total||1,443 km2 (557 sq mi)|
|Elevation||134 m (440 ft)|
|o Density||140/km2 (350/sq mi)|
|Time zone||UTC+8 (China Standard)|
Aihui District (simplified Chinese: ; traditional Chinese: ; pinyin: ) is an administrative district and the seat of the prefecture-level city of Heihe, Heilongjiang Province, People's Republic of China. It is located on the right (south-western) bank of the Amur River, across which is Blagoveshchensk, Amur Oblast, Russia. According to the prefectural government, the land area of Aihui District is 1,443 km2 (557 sq mi), the population is 197,240 people.[when?]
In 1913 Aigun became the county seat of the newly created Aigun County (, Aihun xian), which was in December 1956 renamed Aihui County (). 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.