Yánchéng

Yánchéng owes its name to the salt made along the coast of northern Jiāngsū. Established as Yándú County under the Hàn, it lay among salt works and waterways near the Yellow Sea. In the Sòng period the official Fàn Zhòngyān helped organize the repair of a long sea dyke to protect the coastal lands from the tides. Later generations remembered it as the Fàn Gōng Dyke.