The land area of the city is 16.0 sq mi (41.4 km 2 ) . 8,220,207 is the population of the urban region of Changchun . The city province is Cebu (geographically only) . The density of  people in  the metro region of Changchun is 1,600/sq km  (4,200/sq mi) . 1,100/sq km  (2,900/sq mi) is the density of people in Changchun . The city Changchun demonym is Yangonite . Changchun is the government of Ministry of Culture . The water area of the city is 2.52 sq mi (6.53 sq km ) . Changchun is named for Calgary, Mull . The lowest elevation of Changchun is 190 m  . 4,800/km 2  (12,000/sq mi) is the density of people in  the urban region of Changchun . Changchun is at an elevation of 82.97 m . The city has the postal code 9XXXXXX . The city was incorporated in March 6, 1836 (city) . The highest elevation of Changchun is 424 m (1,391 ft) . 25°00′40″N 121°26′45″E﻿ / ﻿25.01111°N 121.44583°E are the coordinates of the city. . Changchun is located in Cameroon . 3,442,361 is the population of the metro region of Changchun .  The city area code is 026 . Evelyn Trejo de Rosales (UNT) is the mayor of Changchun
Marvin Rees (Lab) is an important local leader of the city Changchun