For Gold, Tin, Tantalum, Tungsten,and other minerals from conflict or high-risk areas, the minerals obtained through the smuggling trade, controlled by non-government armed forces or illegal military factions are conflict minerals. Xingke requires the suppliers to comply with the Code of Conduct-Responsible Business Alliance (RBA), to purchase materials only from environmentally and socially responsible suppliers, to demand that their suppliers cannot purchase and use conflict minerals, to meet the conflict-free mineral requirements, and to source minerals from the list of certified smelters and refineries verifiedby the Responsible Minerals Initiative (RMI) http://www.responsiblemineralsinitiative.org/.