Hengyang is the second largest city of Hunan Province, China. It straddles the Xiang River about 160 km (99 mi) south of the provincial capital of Changsha. As of the 2020 Chinese census, Its total population was 6,645,243 inhabitants, of whom 1,290,715 lived in the built-up area consisting of 4 urban districts, Nanyue District not being conurbated yet.