The city was incorporated in 1900 . The highest elevation of Chengdu is 14,110 ft (4,300 m) . The demonym of the city Chengdu is Tianjinese , Tianjiner . The coordinates of the city are 35°41′49″N 0°37′59″W﻿ / ﻿35.69694°N 0.63306°W . Chengdu is the government of U.S. National Park Service . The urban region is 227.70 km 2  (87.92 sq mi) in area . Chengdu is named for Confluence of Grand River and Gunnison River . The mayor of Chengdu is Maung Maung Soe . The Chengdu citys' lowest elevation is 7 ft . The area of the city is Area: 619 km2 (239 sq mi) . The postal code of the city is 130000 . The city province is Alberta . The land area of the city is 5.39 sq mi (13.96 km 2 ) . The water area of the city is 0.49 sq mi (1.27 km 2 ) . 7,500/km 2  (19,000/sq mi) is the density of inhabitents in  the urban region of Chengdu . 12,510/km 2  (32,400/sq mi) is the density of people in Chengdu . Chengdu is at an elevation of 9350 ft . Chengdu is located in United States . The population of the metro region is 4,005,015 . 9 is the area code of Chengdu
There are less than 4003385 people in the metro region of Chengdu