A few days before the fall of the city, the National Government of China was relocated to the southwestern city Chungking (Chongqing) and resumed Chinese resistance. In 1940, a Japanese-collaborationist government known as the "Nanjing Regime" or "Reorganized National Government of China" led by Wang Jingwei was established in Nanjing as a rival to Chiang Kai-shek's government in Chongqing. In <answer>1946</answer>, after the Surrender of Japan, the KMT relocated its central government back to Nanjing.
When did the KMT move back to Nanjing?
1946