Political party founded in China in 1921 by Chen Duxiu and Li Dazhao .
It grew directly from the reform-oriented May Fourth Movement and was aided from the start by Russian organizers. Under Russian guidance, the CCP held its First Congress in 1921; the Russians also invited many members to the Soviet Union for study and encouraged cooperation with the Chinese Nationalist Party . This cooperation lasted until 1927, when the communists were expelled. CCP fortunes declined rapidly after several failed attempts at uprisings, and the few members that remained fled to central China to regroup, where they formed a soviet-style government in Jiangxi. Harried by the Nationalist army under Chiang Kai-shek , the CCP forces undertook the Long March to northwestern China, when Mao Zedong became the party's undisputed leader. War with the Japanese broke out in 1937 and led to a temporary alliance between the CCP and the Nationalists. After World War II, the CCP participated in U.S.-mediated talks with the Nationalists, but in 1947 the talks were abandoned and civil war resumed. The CCP increased its already strong rural base through land redistribution, and in 1949 it took control of mainland China. In the decades that followed, radical members led by Mao and moderates led initially by Liu Shaoqi vied for control of the party and the direction of China. After Mao's death in 1976 the party moved steadily toward economic, if not political, liberalization. The government's brutal suppression of student protesters at Lin Biao ; Zhou Enlai ; Deng Xiaoping .