Tanchang County

The circle Dangchang (宕昌 县; pinyin: Dangchang Xiàn ) is a district of the prefecture-level city in southeastern Longnan northwest China's Gansu Province. It has an area of 3331 km ² and has 290,000 inhabitants. Its main town is the large village Chengguan (城关 镇).

The place of meeting of Hadapu ( Hadapu huiyi Jiuzhi哈达 铺 会议 旧址) is on the list of monuments of the People's Republic of China ( 5-511 ) since 2001.