The opera tells how a teahouse keeper hides wounded soldiers of the 新四军 in the reed marshes during the war against Japan. It was one of the eight model works, 样板戏, of the Cultural Revolution, and the marshes are now a scenic area.
usage
浜 is a Wu word for a creek, common in place names around Shanghai; 洋泾浜, a creek in old Shanghai, gave its name to Chinese pidgin English.