Gangtie Road, Donghai County, Lianyungang City, Jiangsu Province. According to official website, Lianyungang Donghai Jewelry and Lianyungang Donghai Jewelry Transit Warehouse are Lianyungang Donghai Crystal City, located in Gangtie Road, Donghai County, Lianyungang City, Jiangsu Province. The transit warehouse was first used for cross-border e-commerce as a transit point for logistics. There are many transit warehouses in Shenzhen.