Huainan Circuit or Huainan Province was one of the major circuits during the Tang dynasty, Five Dynasties period, and early Song dynasty.
Huainan was also the name of Wu, whose territorial claims was nearly identical to the circuit.
Its administrative area, between the Huai River and Yangtze, corresponds to roughly the modern provinces of northern Jiangsu, northern Anhui, southern Henan and northern Hubei, with a tiny part of Jiangxi.
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