一、十一届三中全会以来,党中央在改革开放和发展社会主义市场经济的新形势下,对保持党的先进性、纯洁性问题尤为关注,高度重视,并采取许多重大措施和步骤,这主要是基于以下几方面原因一是由于长达十年之久的“文化大革命”,党的自身建设上“左”的错误路线的影响,加之林彪、“ I. Since the Third Plenary Session of the Eleventh Central Committee of the Communist Party of China, under the new situation of reform and opening up and the development of a socialist market economy, the CPC Central Committee has paid special attention to maintaining the advanced nature and purity of the party, attaching great importance to it and taking many important measures and steps. This is mainly due to the following reasons: First, due to the mistaken line of “left” made by the “Cultural Revolution” of over a decade and the self-construction of the party, Lin Biao,