 After the Mukden Incident, he opposed the Northeast border defense headquarters surrender to the Japanese forces, and commanded his troops on September 19 to withdraw from the Kirin provincial capital, and sent his troops during October to oppose the Japanese, fighting near Binxian.In at the end of January, 1932, Feng joined Ting Chao, Li Du, Xing Zhanqing, Zhao Yi to form the Jilin Self-Defence Army, and was chosen for assistant deputy commander and commanded troops in the defense of Harbin.After Ting's beaten forces retired from Harbin to the northeast down the Sungari River, to join the Lower Sungari garrison of Gen. Li Du.