Xu Shichang
Relations deteriorated further when Sun became "extraordinary president", a move not condoned by the Provisional Constitution. It was Chen who first invited the Chinese Communist Party to Guangdong against Sun's objection that the Communists might dilute the movement. After the First Zhili-Fengtian War in 1922 there was a strong movement to reunite the northern and southern governments by having both Sun and Xu Shichang resign their rival presidencies in favor of restoring Li Yuanhong as president of a united republic. Chen was enthusiastic but Sun felt the new government would be a powerless puppet of the Zhili clique.