Xiaogan () is a prefecture-level city in east-central Hubei province, People's Republic of China, some 60 km northwest of the provincial capital of Wuhan. According to the 2010 census, its population totaled 4,814,542, of whom 908,266 lived in the built-up ("or metro") area of Xiaonan District.
Wuhan had a population of 4,814,541 in 2010.
The population of Wuhan is never mentioned, so we don't know. It's difficult because the text mentions Wuhan, then says "its population" shortly after, but really it's referring to Xiogan.