中国共产党自1921年成立以来，在领导我国革命、建设和改革的过程中，有两次大发展的时期。一次是从1935年1月遵义会议的召开到1956年9月党的八大；一次是从1978年12月十一届三中全会的召开直到现在的社会主义现代化建设和改革开放事业的蓬勃发展。第一次大发展延续了21年多时 Since the founding of the Chinese Communist Party in 1921, there have been two major developments in the process of leading our revolution, construction and reform. Once from Zunyi Meeting in January 1935 to the Eighth Congress in September 1956; the first was from the Third Plenary Session of the Eleventh Central Committee held in December 1978 until the present socialist modernization drive and the vigorous development of the reform and opening up. The first major development lasted more than 21 years