Huai'an, formerly Huaiyin, is a prefecture-level city in central Jiangsu Province in Eastern China. As of 2020, the built-up area of its 3 centr…Huai'an, formerly Huaiyin, is a prefecture-level city in central Jiangsu Province in Eastern China. As of 2020, the built-up area of its 3 central urban districts had 2,544,767 inhabitants and the prefecture-level city as a whole had 4,556,230 inhabitants, down from 4.8 million in 2010.
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