The first National Congress of the Chinese Communist Party opened in a house in Shanghai.

The 1st National Congress of the Chinese Communist Party was held in Shanghai and Jiaxing between July 23 and August 2, 1921.

The Communist Party of China (CPC), commonly known in English as Chinese Communist Party (CCP), is the founding and sole ruling party of the People's Republic of China (PRC). Founded in 1921, the CCP emerged victorious in the Chinese Civil War against the Kuomintang and proclaimed the establishment of the PRC under the chairmanship of Mao Zedong in October 1949. Since then, the CCP has governed China and has had sole control over the People's Liberation Army (PLA). As of 2024, the CCP has more than 100 million members, making it the second largest political party by membership in the world.

The Site of the First National Congress of the Chinese Communist Party is now preserved as a museum in Shanghai, China. It is located in Xintiandi, on Xingye Road. It is located in the historical shikumen buildings in which the 1st National Congress of the Chinese Communist Party took place during the month of July in 1921.