(idiom) worth a multiple of several cities; invaluable; extremely precious

Liancheng, a county in [[龙岩市|龍巖市|long2 yan2 shi4]] in western Fujian province.

A gem of inestimable value; something extremely precious. The name refers to the legendary [[和氏璧|和氏璧|he2 shi4 bi4]] which the King of Qin offered to trade fifteen cities to obtain.