Chongqing is at an elevation of 1397 m . 15,000/km 2  (40,000/sq mi) is the density of residents in Chongqing . The postal code of the city is 090101 to 090158 . The city water area is 3.4 sq mi (8.8 sq km) . The mayor of Chongqing is Vladimir Panov . The urban region is 225,574 km 2  (87,095 sq mi) in area . The density of  residents in  the urban region of Chongqing is 3,423/km 2  (8,870/sq mi) .  The city area code is 9 . Chongqing is the government of Municipality of Quito . The city Chongqing demonym is Delhiite . The highest elevation of Chongqing is 91 m (299 ft) . On December 23, 1814 (village) the city was incorporated . The Chongqing citys' lowest elevation is 7 ft .  31°12′N 29°55′E﻿ / ﻿31.200°N 29.917°E are the coordinates of the city. . The city Chongqing province is Sichuan . Population (2014): 7,360,703 is the population of the metro region of Chongqing . The city is 641 km 2  (247.6 sq mi) in area . The land area of the city is 340.5 sq mi (881.9 sq km)
PS use 16000 to post mail in the city