New energy projects, integrated smart energy project development, operation and maintenance and general engineering contracting; mechanical and electrical engineering, pipeline installation projects; installation and maintenance of mechanical and electrical equipment and pipelines; operation management and technical consulting of large and medium-sized photovoltaic power stations, small on-grid (off-grid) photovoltaic power generation systems, and photovoltaic building integration projects; power supply; power marketing; production and sales of finished aluminum materials and auxiliary materials; production, processing and sales of aluminum alloy containers; deep research and development of aluminum Research and development, production and installation of processed products (excluding hazardous chemicals); solid waste recycling and treatment, hazardous waste management (operation with qualification certificate) and resource technology research and development and product sales; processing, manufacturing and repair of metal structural parts, casting parts, and metallurgical special parts; production, sales and technical services of mechanical and electrical equipment; Level 2 general contracting of construction projects (subject to the scope of contracting projects approved by the qualification certificate); project management and consulting services