Qinhuangdao Dongyan Energy Conservation Technology Co., Ltd. (“Dongyan”) is located in the eastern district of national Qinhuangdao Economic and Technological Development Zone, with Beijing and Tianjin in the west and Liaoning and Shenyang in the east. Located in the center of the Bohai Economic Rim, it boasts convenient air, sea and land transportation. Established in March 23, 2001 with a registered capital of RMB 51 million, the company, a high-tech private corporate enterprise specializing in the production of pressure pipelines, covers an area of 20,282 square meters, including 3 standardized industrial workshops of 13,260 square meters and an administrative office building of 1,300 square meters. The company has set up Pipeline Division, Pressure Vessel Division and New Product Division to promote innovative research and development of various products in an all-around manner. As a high-quality pressure pipeline service provider, Dongyan is taking the lead in terms of stainless steel welded bare pipes, stainless steel corrugated heat exchange pipes, stainless steel internal wave heat exchange pipes, stainless steel screwed heat exchange pipes, stainless steel coiled heat exchange pipes and stainless steel serpentine heat exchange pipes. Among them, the stainless steel corrugated pipe with molding plate has been approved as a patented product by the State Patent Office and has received good market response. In addition, the company made efforts in technology and equipment research and development, and won the 2015 State Technological Invention Award and the gold award at the 9th Patent Technology Exhibition. Upholding the development strategy of "active product-led development", the company, by virtue of its innovative product development and market expansion, witnesses explosive growth in its market share and full coverage in domestic market. Moreover, its products have been widely used in various industries such as petroleum, electric power, chemical industry, medicine, food, machinery, heating, refrigeration, boosting comprehensive coverage and gradient upgrading of product market channels. We will make further efforts to deepen its research and development of products and expand its market channels, and then embark on a path to the international market. Building brands with sincerity and creating brilliance with care. Upholding the policy of "serving customers, providing reliable products, controlling each process and realizing continuous improvement", we earnestly implement the Company's GB/T 19001-2000 Quality Management System Requirements, continuously provide customers with satisfactory products and services, and fully realize the development vision of "high quality pressure pipeline service provider".