Lin Biao delivered the keynote political report at the congress. The report lauded the ideology of "continuous revolution," i.e., that the bourgeoisie continues to attempt capitalist restoration after they have been overthrown from power, and that such attempts should be struck down preemptively. Lin's keynote address was strongly applauded by the delegates, and frequently interrupted by rounds of slogan-chanting. The Congress labeled Liu Shaoqi as the "headquarters of the bourgeoisie".
1,512 delegates were represented at the Congress, although they were not all members of the Party. A significant number represented Red Guard groups, and there was a marked increase in the size of the PLA delegation, many of whom were loyal to Lin Biao.
At the Congress, Mao's "continuous revolution" ideology was written into the Party Constitution. Lin Biao was named "the close comrade-in-arms of Chairman Mao and his successor".
After Deng Xiaoping took power in 1978, the Congress was deemed to have been "incorrect ideologically, politically, and organizationally. The guiding directions of the congress were, on the whole, wrong." 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 Communist Party of China.