The founding of the People's Republic of China by Mao Zedong (October 1) took place on October 1, 1949. On this day, Mao Zedong proclaimed the establishment of the People's Republic of China in Tiananmen Square, Beijing, officially ending the Chinese Civil War between the Communist Party and the Nationalist Party (Kuomintang). This event marked a major turning point in modern Chinese history, leading to significant political, economic, and social changes across the country. Following the proclamation, the new Communist government under Mao Zedong took control of mainland China, while the Nationalist government retreated to Taiwan. At the time, China's population exceeded 540 million, and the shift in power affected the lives of millions. The founding of the People's Republic initiated sweeping reforms in agriculture, industry, and education, and established a new governmental structure. This event is commemorated annually in China as National Day, with official ceremonies, military parades, and public celebrations. In the Gregorian calendar, October 1 is recognized as the founding day of the People's Republic of China. The observance was officially added to the calendar by decision of the Chinese government in 1949 to commemorate this fundamental transformation.