Acheng District (simplified Chinese: 阿城区; traditional Chinese: 阿城區; pinyin: Àchéng Qū; Manchu: Alchuka) is one of nine districts of Harbin, the capital of Heilongjiang province, People's Republic of China, covering part of the southeastern suburbs. As of 2010, it had a population of 596,856 residing in an area of 2,680 square kilometres (1,030 sq mi), and is 29 km (18 mi) southeast of downtown Harbin, 190 km (120 mi) north of Jilin City, and around 50 km (31 mi) south of the Songhua River. It lies within the basin of, and was until 1909 considered synonymous with, the Ashi River (Chinese: 阿什河; pinyin: Āshíhé; Wade–Giles: A-shih-ho). The district administers nine subdistricts, eight towns, one township, and one ethnic township.