Zhenjiang, alternately romanized as Chinkiang, is a prefecture-level city in Jiangsu Province, China. It lies on the southern bank of the Yangtze River near its intersection with the Grand Canal. It is opposite Yangzhou and between Nanjing and Changzhou. Zhenjiang was formerly the provincial capital of Jiangsu and remains as an important transportation hub. As of the 2020 census, its total population was 3,210,418 inhabitants whom 1,266,790 lived in the built-up area made of the 3 urban districts. The town is best known both in China and abroad for Chinkiang vinegar, a fragrant black vinegar that is a staple of Chinese cooking.

The Grand Canal is a system of interconnected canals linking various major rivers in North and East China, serving as an important waterborne transport infrastructure between the north and the south during Medieval and premodern China. It is the longest artificial waterway in the world and a UNESCO World Heritage Site.