Haikou is China's youngest provincial capital, set at a river mouth about 460 kilometres across the Gulf of Tonkin from Hanoi, on an island the Han once governed in the same province as Vietnam's Red River delta.
海口是中国最年轻的省会,坐落在一处河口,隔北部湾与河内相距约四百六十公里,而它所在的这座岛,汉朝曾把它与越南红河三角洲划在同一个州里。
Its name is...
