Changchun was also the capital of Manchukuo, a nominally independent puppet state set up by the Japanese in Manchuria, and which existed from 1931 to 1945.
... (2.3 mi²). 5.4 km² (2.1 mi²) of it is land and 0.6 km² (0.2 mi²) of it is water. The total area is 9.61% water. Demographics As of the census ...