國民政府軍事委員會
In 1935, Jiang was appointed as a high-level consultant in the Military Affairs Commission. In the following year, he travelled to Europe again on a study tour. After returning to China, he advised the Nationalist government to develop its air force and further modernise the military. During the trip, he also secretly contacted the German and Italian governments and urged them to support China if war broke out. During the Xi'an Incident in December 1936, Jiang managed to persuade Zhang Xueliang to release Chiang Kai-shek.