The "cultural revolution," which lasted for 10 years from May 1966 to October 1976, was initiated and led by Mao Zedong, the then chairman of the CPC Central Committee. Taking advantage of Mao Zedong's mistakes in his later years, the Lin Biao and Jiang Qing counter-revolutionary cliques, unbeknownst to Mao, engaged in activities that brought great calamity to the country and people, causing the most serious setbacks and most damaging losses to the country since the founding of the People's Republic of China. In spite of the grievous mistakes Mao Zedong made during the "cultural revolution," his lifetime record shows the his contributions to the Chinese revolution far outweighed his errors.

Drawing on the support of the broad masses of the Chinese people, the CPC smashed the Jiang Qing clique in October 1976. A new era of development unfolded in Chinese history. In July 1977, responding to the fervent demands of all the people, the CPC reinstated Deng Xiaoping in all the Party and government posts he had been dismissed from during the "cultural revolution." The Third Plenary Sessions of the CPC 11th Central Committee held at the end of 1978 represented a great turning point of profound significance in the history of New China.