 In the next few years with Zhao Shangzhi and Li Yanlu made coordinated raids and attacked and occupied Linkou for a time, and founded the Tangyuan guerrilla base in the lower Songhua River.In May 1939, Li assumed the command of the 3rd Route Army of the Northeast Anti-Japanese United Army.He then carried out guerrilla war in the Songnen Plain against the Japanese, and overran Nehe, Keshan, Zhaoyuan and other counties.