(Topics include but are not limited to)
Topic 1: Green Technology
Green reaction medium
Green Chemical Industry
catalyst technology
Bioenergy and Biotechnology
Waste management and wastewater treatment
RESOURCE RECYCLING
Energy Efficiency and Sustainable Technologies
Green materials
Green Building
Green design, manufacturing, and engineering processes
New and Renewable Sources of Energy
Distributed energy
Photovoltaic energy system
Energy storage and conversion
energy conservation
Clean energy systems and technologies
Solar engineering
Biomass Energy Engineering
wind engineering 
Hydrogen and fuel cells
nuclear engineering
2. Energy storage and energy-saving technologies
Energy materials
Storage technology
Energy saving technology
Energy and chemical engineering
Energy saving lighting products and technologies
gasification
Green energy system
Green power production and cogeneration
Carbon dioxide capture, storage, and utilization
Energy and Energy Economy Analysis
Topic 2: International Cleanliness
Clean energy systems and technologies
Solar engineering
Biomass Energy Engineering
wind engineering 
Hydrogen and fuel cells
nuclear engineering
Clean energy systems and technologies
Solar engineering
Biomass Energy Engineering
wind engineering 
Hydrogen and fuel cells
nuclear engineering
Renewable energy integration
Green hydrogen production
Energy storage solutions
Carbon Capture, Utilization, and Storage (CCUS)
Offshore wind energy
Solar photovoltaic (PV) efficiency
Bioenergy and biofuels
Smart Grid and Digital Energy System
Reduction of methane emissions
Circular Economy and Energy
Energy Efficiency and Architecture
Ocean and Wave Energy
Decarbonization of Transportation
Waste to energy technology
Topic 3: Mechanical and Electrical Engineering
Measurement and control
automation
mechanical engineering
Motion control
Aerodynamics
heat exchanger
nanotechnology
Computational Mechanics
machine vision
Energy saving technology
Circuits and Systems
Fuels and Combustion
heat and mass transfer
Industrial Tribology
machinery dynamics
Sensor development
Sensors and Applications
Phasor measurement technology
Mechatronics control
Electronic Science and Engineering
Sensors and Actuators
MEMs
Electrical and electronic technology
Computational Fluid Dynamics
Noise and vibration analysis
Solid and Fracture Mechanics
Computational Intelligence and Optimization
Energy storage technology and systems
Energy Internet equipment
Friction and Reverse Engineering
Wide bandgap semiconductor devices
Magnetic and capacitor design
Microgrid and Nanogrid
Intelligent optimization algorithms and applications
Intelligent power distribution and microgrid
Power converter control technology
Sensors, Communication, and Networks
Smart grid architecture and model
Mechanical, force, and tactile sensors
Battery Technology - Materials and Systems
The Application of Internet of Things in Smart Grid
Intelligent metering, measurement, instrumentation, and control
Sensor design, sensor fusion, sensor network
Grid protection, reliability, energy/power quality, and maintenance

Thermal network, storage, import/export, control, optimization

mechanical automation
Automated instruments and equipment
Mechatronics
mechanical engineering
Human Computer Interaction and Mechanical and Electrical Engineering
Factory modeling and automation
Electrical Engineering
Power Quality and Electromagnetic Compatibility
Power system and its automation
Power System Planning and Scheduling
Power system stability
Power System and Energy
control
environmental dynamics
Mechanical and Electrical Control Technology
Electrical and Electronic Technology
Electric motors and electrical equipment
Electrical Engineering and Automation
Microelectronics Technology and Design
Modern automated production equipment
mechanical design and manufacturing engineering
Mechatronics Technology and Product Design