Zhongshan (中山) is a city in the south of the Pearl River[?] Delta in Guangdongprovince in China. The city was originally a county named in honour of Dr. Sun Zhongshan. Dr. Sun was born Sun Yat-sen in Cuiheng Village (翠亨村) of this place.
... 13,363 families residing in the city. The population density is 481.1/km² (1,246.0/mi²). There are 23,525 housing units at an average density of 212.1/km² ...