Zhongshan covers an area of 1800 sq km and has a permanent population of some 1.4 million. The city is located in a subtropical humid zone with an annual average temper ature around 23.4°C..

Zhongshan is situated in the Pearl River Delta Region of Guangdong Province, on the west bank of the estuary of the Pearl River. Zhongshan is geographically connected with the province's capital--Guangzhou on the north and in vicinity to Hong Kong Special Administrative Region and Macao Special Administrative Region. The total mileage of the city reaches 1,531 km. There are three foreign trade ports within the city and five airports around. Railway transportation to other parts of the country is also convenient with the railways starting in the nearby Guangzhou.