一2 1世纪 ,在迎接知识经济挑战的过程中 ,我们既需要发展知识密集型产业 ,也需要发展劳动密集型产业 ;既需要高新技术产业 ,也需要中低技术产业。改革开放以来 ,我国经济建设发生了翻天覆地的变化 ,其特点表现为 :经济体制由计划经济向市场经济转变 ,经济增长方式由粗放型向集 In the 21st century, in the process of meeting the challenges of the knowledge economy, we need to develop both knowledge-intensive industries and labor-intensive industries. We need both high and new technology industries and medium and low-tech industries. Since the reform and opening up, China’s economic construction has undergone tremendous changes. Its characteristics are as follows: the economic system has shifted from a planned economy to a market economy, and the mode of economic growth has changed from extensive to collective