World Cultural Heritage in Huai 'an City, Jiangsu Province.

The world cultural heritage is Hongze Lake levee. Also known as "Gaojiayan", "Gaojiadian" and "Gaojiayan", it was built in the Eastern Han Dynasty and located in Huai 'an City, Jiangsu Province. It is a large-scale dike project to prevent the Huaihe River from forming Hongze Lake. The levee starts from Matou Town, Huaiyin District in the north and reaches Jiangba Town, Hongze District in the south. With a total length of over 70 kilometers and a history of 1800 years, it is one of the major water conservancy projects in ancient China.