On October 14, 2003, Shenzhen Science & Technology Supervision carried out an appraisal for the YS-CEMS Continuous Monitoring System of Flue Gas Emission of Fixed Pollution Sources, which is the new product developed by the company. It considered that the performance index of the product is better than the state standards. Approved by the installation in electric power and concrete industry in Tangshan, Liaoning, and Shenyang, the products show the stable operation, correct and reliable monitoring data, and less maintenance, which meet the actual condition and requirement of the home gas monitoring. The products are of high technology content, and great prospect of market. They also meet the industry policy of the country. The experts all agree that the products passed the appraisal.