The core enterprise of Huangshan Chengyi co.,ltd was founded in 1999, covering an area of 50,000 square meters, its total assets has been over one hundred million Yuan, it owns a modernized office building, R&D zone and production workshop, strong innovation strength, advanced technology and equipment and standardized management. It has been passed through certification of 2008 IS00991: the Qouality Management System and Safety Production Standardization Level 3 Enterprise (mechanical) .The produced produces, zinc-coated steel wire, zinc-coated steel wire strands , aluminum clad steel wire, aluminum clad steel wire strands and low carbon steel wire with "Chengyi" brand is widely used in electric cable, telecommunication, electrified railway, infrastructure projects, etc, and exported to the international market such as Japan, the Philippines, Span and Russia.