Huangpu Town is 2m above sea level, nantou town is 1.4m above sea level, and Banfu Town is 140m above sea level. According to the query of official website of Zhongshan Geological Bureau, the altitude of Zhongshan towns is 2m, nantou town 1.4m and Banfu Town 140m, but not limited to. Zhongshan, known as Xiangshan in ancient times, is a prefecture-level city under the jurisdiction of Guangdong Province. Its city boundary lies between 2211'-22 47' north latitude and113 46' east longitude, and it is located in the Pearl River.