The 9th National Congress of the Chinese Communist Party (CCP) was held in the Great Hall of the People, Beijing, between April 1 and 24, 1969.
The Congress formally ratified the political purge of Liu Shaoqi and Deng Xiaoping, and elevated Mao's radical allies to power.
Lin's keynote address was strongly applauded by the delegates, and frequently interrupted by rounds of slogan-chanting.
A significant number represented Red Guards groups, and there was a marked increase in the size of the People's Liberation Army delegation, many of whom were loyal to Lin Biao.
Part of the Long Live the Victory of Mao Zedong Thought statue includes a group of soldiers and civilians propagating the appeal of the 9th National Congress of the Chinese Communist Party.