Wuhu ranked first in terms of GDP, with the Primary Industry being its biggest contributor, among the 16 prefectures in Anhui Province.
These 16 prefecture-level cities are in turn subdivided into 105 county-level divisions (44 districts, 6 county-level cities, and 55 counties). However, the provincial GDP per capita is based on the population registered in the province (that is, with local Hukou), but not necessarily residing there. Therefore, the per-capita GDP of provinces with many residents working elsewhere is likely underestimated. 
