Abstract: The “Resolution of the Central Committee of the Communist Party of China on Major Achievements and Historical Experience of the Party’s Centennial Struggle” adopted at the Sixth Plenary Session of the 19th Central Committee of Communist Party of China in November 2021 is the third “Historical Resolution” in the Party’s history. For more than a hundred years, Communist Party of China has been able to correctly and maturely understand and summarize experience from history. It can be seen from the three “Historical Resolutions” that in order to obtain long-term guiding significance of truth from history, we must adhere to and correctly use the basic methods of historical materialism to understand history; we must carefully analyze the domestic and international situations and correctly grasp the stage of social development, which is the basic prerequisite for summing up history correctly. We must also take consolidating and strengthening the unity of the Party, focusing on what is being done, and advancing towards new goals as the fundamental purpose of summing up history.