Situated at the northern edge of Hainan Island looking out on the South China Sea, Haikou City is located 18 nautical miles south of Leizhou Peninsula in China's southern Guangdong Province across the Qiongzhou Strait. Haikou is made up of three county-level districts, has a total area of about 250 sq km, a population of about 650,000 and is adjacent to Qiongshan City to the southeast and adjoins Chengmai County to the west.