Following the invasion of northeast China by the Empire of Japan, and the Defense of Harbin. Ding Chao's beaten JSDA retired from Harbin and marched to the northeast down the Songhua River, to join the Lower Songhua garrison of General Li Du and together formed the nucleus of armed opposition in the erstwhile Jilin province.
References
^Suleski, Ronald (July 1981). "Northeast China under Japanese Control: The Role of the Manchurian Youth Corps, 1934–1945". Modern China. 7 (3): 365. doi:10.1177/009770048100700304. S2CID144715103.