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In page Chinese Communist Party:

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The core ideology of the party has evolved with each distinct generation of Chinese leadership. As both the CCP and the People's Liberation Army promote their members according to seniority, it is possible to discern distinct generations of Chinese leadership.[1] In official discourse, each group of leadership is identified with a distinct extension of the ideology of the party. Historians have studied various periods in the development of the government of the People's Republic of China by reference to these "generations".[citation needed]