sentences:  He attended the First Congress in Shanghai in July 1921, but quit the Communist Party in 1924 to join the Kuomintang.He was assigned as a secretary to the Public Relations Department of the central government, but maintained strong ties with the party's leftist clique, headed by Wang Jingwei and Liao Zhongkai.He strongly opposed Chiang Kai-shek’s Northern Expedition and Chiang Kai-shek’s conduct of the Second Sino-Japanese War.