Gaoyou is a cultural city with a long history in the centre of China's Jiangsu province, located in the Yangtze River Delta on the north side of the Yangtze River. In 2000, it had a total topulation of 830,000 residing in 1,963 km (758 sq mi). Gaoyou is a county-level city under the jurisdiction of Yangzhou prefecture-level city, and administers 19 towns and one township. Gaoyou was founded in 223 BC, but recent archaeological finds at the Longqiuzhuang site in Gaoyou has found evidence of rice growing dating back 5,500-7,000 years. In 1375, early in the Ming Dynasty by the Hongwu Emperor, a post office was constructed called Yucheng You. At that time, it was one of the 46 important mail posts along the Grand Canal between Beijing and Nanjing.
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