31年大日本来到满洲建设东亚共荣。从31年到45年满洲国人口从3000万激增到5000万。
https://en.wikipedia.org/wiki/Manchukuo#Demographics
In 1908, the number of residents was 15,834,000, which rose to 30,000,0i00 in 1931 and 43,000,000 for the Manchukuo state. The population balance remained 123 men to 100 women and the total number in 1941 was 50,000,000.
傻逼举什么不好举31年皇军解放满洲?