Energy-saving emission reduction, environmental protection, Beijing: petroleum chemical industry, energy-saving emission reduction, flue gas desulfurization de nitrification business, solid waste treatment and remediation of contaminated sites, environmental water, organic waste recycling processing, wind power, photovoltaic power generation; at present, China energy conservation industry market segments in the industrial energy efficiency, building energy conservation, waste treatment, flue gas treatment and heavy metal pollution, soil remediation, water treatment, photovoltaic power generation, wind power, energy saving and environmental protection and new materials in the field of scale and strength ranks the leading position.