Haizhou Bay

Haizhou Bay's coast formed the seaward edge of a salt-producing region linked to the inland waterways of northern Jiangsu. Its history cannot be reduced to an unchanging shoreline: the routes between the coast, Haizhou and Huai'an were repeatedly maintained and altered to carry goods and discharge excess water.

In 1617 salt merchants pooled funds to dredge the official waterway running north from Andong County towards Haizhou. In 1687, during Jin Fu's canal works, an east–west drainage route was cut along the older official channel. The Qianlong-era Huai'an gazetteer describes its waters passing through Andong into Haizhou's Wuzhang River and then to the sea, serving both flood relief and the transport of salt and fuel. These are records of the coastal hinterland, rather than naval events within the bay, but they explain a specific connection between maritime salt production and the inland transport system before 1837.