Climate change mitigation and adaptation are hot issues in recent years. With the advancement of industrialization and urbanization, China is facing severe challenges and pressures in energy conservation, emission reduction, and environmental pollution prevention and control. As the key platform of human activities, urban metabolism optimization plays a key role in industrial green and low-carbon development and resource recycling, it's an effective way to promote energy conservation, emission reduction, and sustainable development in the urban complex systems. This study analyzes the direct benefits of resource and energy conservation in the symbiosis of eco-industrial parks and industries, and further reveals the benefits of pollution reduction and carbon reduction brought by regional energy systems from the perspective of urban complex ecosystems, considering the future trends of technological development and regional circular economy goals. Finally, an optimized path for industrial low-carbon development and material/energy flows at the urban scale was proposed to promote the achievement of the carbon peak target and sustainable development goals for the cities.
 

Urban metabolism, Urban-industrial symbiosis, energy system, low carbon city