Hong Kong is officially the Hong Kong Special Administrative Region of the People's Republic of China (HKSAR), is a metropolitan area and special administrative region of the People's Republic of China on the eastern Pearl River Delta of the South China Sea. With over 7.5 million residents of various nationalities[d] in a 1,104-square-kilometre (426 sq mi) territory, Hong Kong is one of the most densely populated places in the world.