铜冠铜箔：公司向控股股东铜陵有色采购铜原料，供应稳定，铜品质较高且具有地域优势

Group 1 - The company Copper Crown Copper Foil (301217.SZ) confirmed that it sources copper raw materials from its controlling shareholder Tongling Nonferrous Metals, ensuring stable supply and high-quality copper with regional advantages [2] - The procurement price for copper is based on publicly available market quotations [2]