Manchukuo was a puppet regime established by the Japanese invaders in Northeast China after the September 18th Incident in 193 1. Through this puppet regime, Japanese colonial rule lasted for 14 years in the northeast of China, which made the compatriots in the northeast suffer greatly from conquered people. The "territory" of the puppet regime includes Liaoning, Jilin and Heilongjiang provinces in People's Republic of China (PRC), eastern Inner Mongolia and northern Hebei. At that time, the Nanking National Government of China did not recognize this regime. At that time, Japanese-led fascists and other countries or governments recognized the puppet Manchukuo, and the League of Nations declared that northeast China was still a part of China. The government of China has never recognized this puppet regime that divided the territory of China. The puppet Manchukuo took Xinjing (Changchun) as its capital, and Aisin Giorro Puyi, the last emperor of the former Qing Dynasty, was the head of the puppet Manchukuo. The official language is "Japanese"