study on the medium and long term development strategy of Shanxi 建设国家西部创新中心：陕西中长期发展战略研究：study on the medium and long term development strategy of Shanxi Internal migration and long-term development strategy of China 英文题名:Internal migration and long-term development strategy of China Study on long term energy development strategies of China Research on China's medium and long term energy development strategy. Research on China's medium and long term energy development strategy 并列题名：Research on China's medium and long term energy development strategy Study on Chinese manufacturing development strategy and management Study on China's mid-to-long term low carbon development strategy target and roadmap