What are the main measures to revitalize the old industrial base in Northeast China? (geographical issues)

1. Optimize the economic structure and establish a modern industrial system; 2. Accelerate the technological progress of enterprises and comprehensively enhance their independent innovation capability; 3. Accelerate the development of modern agriculture and consolidate the basic position of agriculture; 4. Strengthen infrastructure construction to create conditions for comprehensive revitalization; 5. Actively promote the transformation of resource-based cities and promote sustainable development; 6. Effectively protect the ecological environment and vigorously develop the green economy; 7. Focus on solving people's livelihood issues and accelerate the development of social undertakings; 8. Deepen cooperation between provinces and regions and promote the development of regional economic integration.