党的十一届三中全会以后 ,我国进入了以经济建设为中心、建设有中国特色社会主义的新时期。发展社会主义市场经济 ,建立和完善市场经济体制 ,是现阶段党的主要任务。与计划经济体制时期相比 ,我国的内外环境和社会关系有了新的调整 ,经济结构和阶级关系发生了显著变化 ,党员在 Since the Third Plenary Session of the 11th CPC Central Committee, our country has entered a new era of building socialism with Chinese characteristics centering on economic construction. Developing the socialist market economy and establishing and improving the market economic system are the major tasks of the party at this stage. Compared with the period of the planned economy, China’s internal and external environment and social relations have undergone a new adjustment. The economic structure and class relations have undergone significant changes.