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History of Yibin
Human habitation of Yibin dates back at least 4,000 years. Yibin was established as a county in the Han dynasty (206 BC − AD 220). Under the Ming and Qing, the town and its hinterland was known as Xuzhou Commandery, which was variously romanized as Suifu, Suifoo,[citation needed] and Suchow. Its population around 1907 was estimated at 50,000.
Source From: https://en.wikipedia.org/wiki/Yibin#History