Nanjing Chang Hui Environmental Engineering Co., Ltd., was established as the main backbone of professional technology R & D laboratories, application of high-tech design software, high technology achievements, the development of market demand for products to meet the needs of the market segmentation, the introduction of European technology, products with small size, light weight, good maintenance-free performance, work continued high rate, advanced configuration, etc., and can be non-standard designs to meet the normal use under various working conditions. The company's quality assurance system emphasizes process control, quality control concept to penetrate into the product design, manufacturing, testing and so the whole process, coupled with advanced detection equipment, meticulous inspection process, strict control assessment procedures, so that every product can be effectively guaranteed.