1. " Manchukuo " was a puppet regime officially installed by Japan in Northeast China in 1932.
2. Changchun used to be the capital of the puppet " Manchukuo State, " rigged by Japanese invaders.
3. The formal room for receiving foreign dignitaries was rarely used, as Manchukuo was recognized only by Japan and the Axis countries.
4. It happened that the Japanese invaders had occupied northeastern China and concocted the bogus Manchukuo.