案例背景自从2003年中央实施振兴东北等老工业基地战略以来,特别是2007年内蒙东部五盟市被国家正式纳入到振兴东北规划实施范围后,东北四省区经济和社会全面快速发展。但由于长期受计划经济影响,东北四省区存在的生产要素受行政分割影响、产业 Case Background Since the implementation of the strategy of rejuvenating the northeast old industrial base by the central government in 2003, especially after the five-nation municipality in eastern Inner Mongolia was formally incorporated into the implementation of northeast planning by the state in 2007, the economy and society of the four northeastern provinces and municipalities have witnessed an all-round and rapid development. However, due to the long-term impact of the planned economy, the factors of production in the four northeastern provinces and autonomous regions are affected by the administrative division. Industries