 Chiang Kai-shek's government fled to Taipei, Taiwan and Chairman Mao Zedong declared the establishment of the People's Republic of China with capital in Beijing on 1 October 1949.The Presidential Palace building was then used for Jiangsu Provincial Government and functions of the Presidential Palace were moved to Presidential Office Building in Taipei.In the late 1980s the former Presidential Palace was transformed into the China Modern History Museum, a history museum exclusively about the 20th century history of modern China, about the history of the Republic of China (1912-1949) and the history of the People's Republic of China.