We provide our dust  removal services based on our proprietary low-low temperature dust removal  technology and wet ESP technology. Dust removal, part of our integrated services  offered to power plants, complements our other emissions control technologies  and forms synergies with our desulfurization and denitrification services. Our  business model for dust removal services was EPC services. We have accumulated  significant experience in the design, installation, commissioning, maintenance  and management of dust removal system of power plant boilers, and successfully  finished many projects in several large power plants in the PRC. We possess  advanced technology in dust removal system. As the newly promulgated Power Plant  Air Pollution Emission Standards, which came into effect since January 1, 2012,  has tightened dust emissions standards for power plants to 20 mg/m³.  In December 2015, according to the Proposals for Comprehensively Implementing  the ultra-low Emissions and Energy-saving Upgrade of Coal-fired Power  Plants issued by the MEP, NDRC and National Energy Administration, the  “ultra-low emission” standard is 10 mg/m³. We anticipate that newly  built power plants and existing power plants installed with non-compliant dust  removal appliances will need to install or upgrade to more efficient appliance,  such as our WESP.

The low-low temperature dust removal  refers to the technology of using flue gas cooler before the flue gas passing  through the dry ESP to reduce the temperature of flue gas to below  85℃, which allows the effective removal of  SO₃ and improves the collection efficiency of dry ESP. The  application of low-low temperature dust removal can control the emission of PM  2.5, allows the residual heat recovery and lowers the water consumption of  desulfurization system. Our dust removal technology has been awarded three  patents in total in the PRC.