Distributed energy integrated engineering, construction engineering, municipal engineering, petrochemical engineering, environmental protection engineering, electric power engineering, metallurgical engineering, electromechanical installation engineering, new energy engineering design, engineering construction general contracting and after-sales service; external contracting engineering design, engineering construction general contracting and after-sales service; development, manufacturing, sales and maintenance services of integrated energy interconnection equipment, large compressors, blowers, ventilators, intelligent equipment, automation equipment, steam turbines, gas turbines and various turbine machinery