In July 1929, Chiang Kai-shek held a secret meeting in the North Pine Mountain (June 3, 1929) and talked about Feng Yuan in the North Pine Mountain. In July 1929, Chiang Kai-shek held a secret meeting in the North Pine Mountain and negotiated Feng Yuan in the North Pine Mountain. In June, Feng Yuan lost Feng Yuan in the first Chiang, Feng Air Conflict and later went to Shanxi, attempting to fight Feng Yuan together with Feng Yuan, Feng Yuan, actively laughed to completely isolate Feng Yuan. At the end of June, Chiang Kai-shek held a secret meeting in the North Pine Mountain, Chiang Kai-shek promised to give Feng Yuan to the country's land, sea, air, and vice commander-in-chief