Yes, after the "September 18th Incident" in 193 1, three northeastern provinces fell, and Japan immediately established Manchukuo here, which was a puppet regime established by the Japanese invaders using the former Qing emperor Puyi. In fact, it was a Japanese colony, which made the compatriots in Northeast China suffer from conquered people.

Japan surrendered to the northeast in 1945 and was recovered, so Japan implemented colonial rule in the northeast of China for 14 years.