When the Japanese invaded China, which part of China had the largest number of Japanese troops?

it should be the three northeastern provinces. The Japanese Kwantung Army is an important part of the Japanese Army. It was named after its invasion of Jinxian in the northeast of China and "Kanto Prefecture" in Dalian. Founded in 1919 and dissolved in August 1945. The Kwantung Army is an army of the Japanese Army stationed in the northeast of China. There are 31 infantry divisions, 11 infantry and tank brigades, 1 death squad brigade and 2 aviation brigades, as well as puppet Manchukuo troops, etc., with about 1.2 million people. In August 1945, the Soviet Red Army sent troops to the northeast, and the Kwantung Army was killed by 83, people and captured by 594, people. After the war, the remaining officers and men of the Kwantung Army were sent to Siberia as prisoners for forced labor.