(Topics include but are not limited to)
Topic 1: Energy
Energy Security and Energy Systems
Energy Conversion and Energy Efficiency
Energy Analysis and Energy Transfer
Hybrid energy system
New technologies for oil and gas development
Solar power
Energy and Electricity
biomass energy 
Energy conservation and efficiency improvement
Energy storage and management
Energy Conversion and Application
Energy materials
Energy storage technology
Conventional energy and new energy
Energy Internet
Primary energy
Secondary energy
Energy and Architecture
Fuel based energy
Non fuel energy sources
Nuclear Engineering and Hydrogen Energy Resources
Renewable energy technologies and systems
Topic 2: Thermodynamics
temperature
quantity of heat
Laws of thermodynamics
Thermodynamic process
thermodynamic equilibrium
Pump and fan
Power plant (external combustion engine/internal combustion engine/gas turbine, etc.)
Fuel and Combustion
Exhaust emissions and control
Heat transfer and heat load
Thermal energy and power
Engineering Thermophysics
Boiler technology
Power Machinery Design
Thermal power plant
Thermal process automation
Heat pump technology
Solar cooling and power generation
Absorption refrigeration
Small refrigeration unit
Topic 3: Environmental Resources
Groundwater remediation
Groundwater management
Water Resources and Watershed Management
Management Practice
Establishment of water quality target standards
Water quality classification
Wastewater and sludge treatment
Sludge treatment and reuse
global warming
Ozone layer depletion
Carbon capture and storage
Biofuels
Air Pollution and Control
Air emissions trading
Solid waste management
Optimization of the collection system
Recycling and reusing
Stable prices of waste
resource management
Technical aspects of handling and disposal methods (landfill, heat treatment, etc.)
Management of hazardous solid waste
Sustainability of Society and Environment
Water scarcity and pollution
Ozone layer depletion
Soil desertification
The forest area has sharply decreased
Some rare species
Minerals are on the brink of depletion
traffic engineering 
Environment and Materials
Environmental Engineering and Energy
Environmental Engineering and Computer Science
Environmental Engineering and Remote Sensing
Environmental Engineering and Big Data
Environmental Engineering and Electrical Engineering
Environmental Engineering and Machinery
Geological Engineering
Geotechnical Engineering
structural engineering 
railway engineering
highway engineering
Earthquake Engineering
Disaster prevention and reduction
Water conservancy and electrical power
Water Conservancy and Computer Applications
Water Conservancy and Mechanical Engineering
Water Conservancy and Power Engineering
Ventilation and Air Conditioning Engineering Technology