Chengdu is located in United States . Area: 619 km2 (239 sq mi) is the area of the city namedChengdu . Chengdu is named for Confluence of Grand River and Gunnison River . 7,500/km 2  (19,000/sq mi) is the density of inhabitents in  the urban region of Chengdu . The city Chengdu demonym is Tianjinese , Tianjiner . The highest elevation of Chengdu is 14,110 ft (4,300 m) . The city province is Alberta . Chengdu is the government of U.S. National Park Service . The postal code of the city is 130000 . 12,510/km 2  (32,400/sq mi) is the density of people in Chengdu . The water area of the city is 0.49 sq mi (1.27 km 2 ) . 4,005,015 is the population of the metro region of Chengdu . The city land area is 5.39 sq mi (13.96 km 2 ) . On 1900 the city was incorporated . The lowest elevation of Chengdu is 2 m  . The coordinates of the city are 35°41′49″N 0°37′59″W﻿ / ﻿35.69694°N 0.63306°W . The area of the urban region is 227.70 km 2  (87.92 sq mi) . Maung Maung Soe is the mayor of Chengdu .  The city area code is 9 . Chengdu is at an elevation of 2850 m
Chengdu was constituted as a city in February 17, 1909