The city was incorporated in 1799 (Guyandotte) . 1,600/sq km  (4,200/sq mi) is the density of people in  the metro region of Chengdu . Chengdu is named for Christopher Columbus . The Chengdu citys' lowest elevation is 1 m  . 7°23′47″N 3°55′0″E﻿ / ﻿7.39639°N 3.91667°E are the coordinates of the city. . Thomas Aujero Small is the mayor of Chengdu . The land area of the city is 16.0 sq mi (41.4 sq km) . The highest elevation of Chengdu is 241.9 m (793.6 ft) . Chengdu is the government of National Park Service . The water area of the city is 2.52 sq mi (6.53 sq km ) . The city has the postal code 21500 . Chengdu has January 1, 1894 population . Chengdu is at an elevation of 3 ft . The density of  people in  the urban region of Chengdu is 5,400/sq km  (14,000/sq mi) . The population of the metro region is 5,278,448 . 242 is the area code of Chengdu . The demonym of the city Chengdu is Tianjinese , Tianjiner . 280/km 2  (740/sq mi) is the density of people in Chengdu
Land covers 134 sq km area of the city