(1) The plenary session completed the rectification of the party's ideological line. The plenary session completely corrected the "Left" errors of the Party's guiding ideology in different periods and degrees since 1957, especially the errors of the "Cultural Revolution", and restored the Party's correct ideological line. (2) The plenary session completed the rectification of the party's political line. The plenary session resolutely stopped using the wrong slogan "taking class struggle as the key link"; Make a great decision to shift the focus of the party and state work to economic construction and realize reform and opening up. (3) the plenary session re-established the correct organizational line of the party, decided to set things right, and examined and resolved a number of major unjust, false and wrong cases within the party. (4) Judging from the Party's guiding ideology and practical work, the second generation of the Party's collective leadership with Deng Xiaoping at the core has been formed. To sum up, the Third Plenary Session of the Eleventh Central Committee is a great turning point with far-reaching significance in the history of the Party since the founding of the People's Republic of China, and it has created a great starting point in the new period of socialist modernization.