The circle Changdao (Chinese 长岛 县, Pinyin Chángdǎo Xiàn) is a district in the eastern Chinese province of Shandong, which belongs to the administrative area of ​​the district-free city of Yantai. It has an area of ​​56 km² and has about 50,000 inhabitants (2001). Its main town is the large community Nanchangshan (南 长 山镇). The late Paleolithic Beizhuang site (北 庄 遗址, Beizhuang yizhi, English Beizhuang site) has been on the list of monuments of the People's Republic of China since 1996 (4-10).