Qingdao iron and steel holding group co., LTD is one of the top ten enterprise groups in Qingdao, a national key metallurgical enterprise, ranking the top among the top 500 enterprises in China. The company has passed iso9001:2000, ohsas18001:2001, iso14001:1996 standard certification successively, and has been awarded the title of national quality and benefit enterprise for many years, and the title of China's good faith, abiding by contract, and valuing quality model enterprise. At present, the main varieties of green steel include: welding steel coil, auto spring flat steel, hard line series cold upsetting steel, PC steel bar wire, drawing wire, easy cutting steel, quality carbon structure round steel, construction wire and screw steel, coke, bicycle, steel nail and other products of more than 40 varieties, more than 100 specifications.