5,400/sq km  (14,000/sq mi) is the density of residents in  the urban region of Chengdu . On 1799 (Guyandotte) the city was incorporated . The Chengdu city highest elevation is 241.9 m (793.6 ft) . The mayor of Chengdu is Thomas Aujero Small . 280/km 2  (740/sq mi) is the density of people in Chengdu . The land area of the city is 16.0 sq mi (41.4 sq km) . 1,600/sq km  (4,200/sq mi) is the density of people in  the metro region of Chengdu . Chengdu is the government of National Park Service . The coordinates of the city are 7°23′47″N 3°55′0″E﻿ / ﻿7.39639°N 3.91667°E . Chengdu has January 1, 1894 population . The metro region has 5,278,448 population . The city has the postal code 21500 . Chengdu is named for Christopher Columbus . 242 is the area code of Chengdu . The city Chengdu demonym is Tianjinese , Tianjiner . The Chengdu citys' lowest elevation is 3 ft . The city water area is 2.52 sq mi (6.53 sq km ) . Chengdu is at an elevation of 3 ft
More than 972 sq km area of the city Chengdu is water