 Subsequently he participated in Feng Yuxiang's Chahar People's Anti-Japanese Army, as its Fourth Route Army commander in chief, against Japan and their Manchukuoan allied forces in the Dolonor area of Chahar.Following the dispersal of that force by Chiang Kai-shek, his force was formed into the 91st Division which Feng commanded until July 1938 when the Division suffered heavy casualties during the battle of Wuhan.He later left the army and went to Hong Kong to engage in business.