When Generalissimo Chiang Kai-shek was held by the mutinous generals, Chang Hsueh-liang and Yang Hu-cheng, at Sian in December 1936 under Communist instigation, Gen. Ku was selected to restrain the rebel troops.
他說：「記得過去和友軍並肩作戰，凡有重大危險的任務，總由自己的部隊擔任；在撤退時，也都由自己的部隊殿後，這樣才能取得友軍的信賴。