Huai'an, known as Huaiyin in ancient times, is a prefecture-level city under the jurisdiction of Jiangsu Province, located in the Yangtze River Delta region, is an important central city in northern Jiangsu Province, a modernized central city in the northern part of the Yangtze River Delta, a member of the Nanjing Metropolitan Area, and the first city to be mentioned in the Huaihe River Ecological and Economic Belt, which is situated at the intersection of the ancient Huaihe River and the Beijing-Hangzhou Grand Canal. It is located at the intersection of the ancient Huaihe River and the Beijing-Hangzhou Grand Canal. It has the fourth largest freshwater lake in China, Hongze Lake, and is a national civilized city.