Bohai Bay
The southern side of Bohai Bay borders the low coast of northern Shandong. The bay is shallow, with a seabed that deepens gradually toward the open waters of the Bohai Sea. River sediment and changing channels have shaped the shore, while salt works used the coastal waters to produce a valuable commodity. During the Ming, salt from the works around Bohai and Laizhou bays was carried by water to markets farther inland.