Understand the historical position and background of the times. According to the information released by the Party School of the Central Committee of the Communist Party of China, to fully grasp the historic achievements and changes made by the Party and the state since the 18th National Congress of the Communist Party of China, we must understand the historical position and background of these extraordinary achievements, because only by understanding the historical position and background can we better face the century-old changes in China and solve new contradictions in a new position.