"Liangdang County (Chinese: \u4E24\u5F53\u53BF; Pinyin: Li\u01CEngd\u0101ng Xi\u00E0n) is a county under charge of Longnan City, Gansu Province of China. It has a land area of 1,374 square kilometers, and a population of 50,000 in 2004. The postal code is 742400. The county seat is located in Chengguan Town."@en .