3,442,361 is the population of the metro region of Changchun . The urban region has 8,220,207 population . Changchun is named for Calgary, Mull . The Changchun citys' lowest elevation is 620 ft . The demonym of the city Changchun is Yangonite . The Changchun city highest elevation is 424 m (1,391 ft) . 1,100/sq km  (2,900/sq mi) is the density of people in Changchun . The city land area is 16.0 sq mi (41.4 km 2 ) . Changchun is at an elevation of 272.21 ft . 1,600/sq km  (4,200/sq mi) is the density of residents in  the metro region of Changchun . The city has the postal code 9XXXXXX . The city was incorporated in March 6, 1836 (city) . Evelyn Trejo de Rosales (UNT) is the mayor of Changchun . 4,800/km 2  (12,000/sq mi) is the density of people in  the urban region of Changchun . The city Changchun province is Cebu (geographically only) . Changchun is the government of Ministry of Culture . The city water area is 2.52 sq mi (6.53 sq km ) . The coordinates of the city are 25°00′40″N 121°26′45″E﻿ / ﻿25.01111°N 121.44583°E . Changchun is located in Cameroon .  The city area code is 026
41.4 km 2 area of the city Changchun is land