Nantong, city, eastern Jiangsu sheng (province), China.It is situated on the northern shore of the head of the Yangtze River (Chang Jiang) estuary. Northward, it is connected with the Tongyang and Tonglü canal systems, which serve the coastal zone of Jiangsu north of the Yangtze and connect westward with the Grand Canal.Tiansheng port, about 7.5 miles …