 In May 1933, with Feng Yuxiang organizing the Chahar People's Anti-Japanese Army, Sun also advocated opposition to Japan and criticized Chiang Kai-shek's central government, yet protested his loyalty to Chiang.The national government feared Sun Dianying would cooperate with Feng's Anti-Japanese Army, allowing them to use the railroad to support their forces.However, Sun was also not willing to be involved in a conflict with Chiang.