Donghai County, Lianyungang itself is the origin of crystal jadeite, and it is a famous jade market in China, with a large output and many merchants, so Myanmar jadeite is generally shipped from Lianyungang.

Lianyungang, known as Haizhou in ancient times, also known as a port city, is a prefecture-level city under the jurisdiction of Jiangsu Province. Lianyungang is named because it faces Liandao, is backed by Yuntai Mountain, and is out of the sea.