Chen Duxiu
In 1921, the Communist Party of China was founded in Shanghai by Chen Duxiu and Li Dazhao, with Mao becoming an early member and attending its first National Congress the following year. In 1923, Mao was elected to the Party's Committee, relocating to Shanghai. The Party agreed to a revolutionary alliance with the Kuomintang nationalist party, a move which gained Mao's enthusiastic support.