The Chengdu citys' lowest elevation is 3 ft . The highest elevation of Chengdu is 241.9 m (793.6 ft) .  The city area code is 242 . Chengdu is the government of National Park Service . 1,600/sq km  (4,200/sq mi) is the density of people in  the metro region of Chengdu . The density of  people in  the urban region of Chengdu is 5,400/sq km  (14,000/sq mi) . The land area of the city is 16.0 sq mi (41.4 sq km) . The density of  people in Chengdu is 280/km 2  (740/sq mi) . January 1, 1894 is the population of Chengdu . Chengdu is named for Christopher Columbus . 5,278,448 is the population of the metro region of Chengdu . The city Chengdu demonym is Tianjinese , Tianjiner . 7°23′47″N 3°55′0″E﻿ / ﻿7.39639°N 3.91667°E are the coordinates of the city. . The city water area is 2.52 sq mi (6.53 sq km ) . The city was incorporated in 1799 (Guyandotte) . Thomas Aujero Small is the mayor of Chengdu . Chengdu is at an elevation of 0.9 m . The postal code of the city is 21500
Thomas Aujero Small is an important person in the city Chengdu