The Third Plenary Session of the Eleventh Central Committee: re-established the Marxist ideological line of seeking truth from facts, stopped using the slogan of "taking class struggle as the key link", made a decision focusing on economic construction, put forward the general policy of reform and opening up, and formed the second generation of leading collective with Deng Xiaoping as the core, which became an important turning point in the history of the party since the founding of the People's Republic of China, marking that China has entered a new era of socialist modernization.