The Chinese Communist Party (CCP), officially the Communist Party of China (CPC), is the founding and sole ruling party of the People's Republic of China (PRC). Under the leadership of Mao Zedong, the CCP emerged victorious in the Chinese Civil War against the Kuomintang. In 1949, Mao proclaimed the establishment of the People's Republic of China. Since then, the CCP has governed China and has sole control over the People's Liberation Army (PLA). Each successive leader of the CCP has added their own theories to the party's constitution, which outlines the ideology of the party, collectively referred to as socialism with Chinese characteristics. , the CCP has more than 98 million members, making it the second largest political party by membership in the world after India's Bharatiya Janata Party.
In 1921, Chen Duxiu and Li Dazhao led the founding of the CCP with the help of the Far Eastern Bureau of the Communist Party of the Soviet Union and Far Eastern Bureau of the Communist International. For the first six years of its history, the CCP aligned itself with the Kuomintang (KMT) as the organized left wing of the larger nationalist movement. However, when the right wing of the KMT, led by Chiang Kai-shek, turned on the CCP and massacred tens of thousands of the party's members, the two parties split and began a prolonged civil war. During the next ten years of guerrilla warfare, Mao Zedong rose to become the most influential figure in the CCP, and the party established a strong base among the rural peasantry with its land reform policies. Support for the CCP continued to grow throughout the Second Sino-Japanese War, and after the Japanese surrender in 1945, the CCP emerged triumphant in the communist revolution against the Nationalist government. After the KMT's retreat to Taiwan, the CCP established the People's Republic of China on 1 October 1949.
Mao Zedong continued to be the most influential member of the CCP until his death in 1976, although he periodically withdrew from public leadership as his health declined.