鑫铂股份：公司的原材料一部分由公司再生铝板块通过购买废铝生产出的铝棒供应给各业务板块

Group 1 - The company sources its aluminum raw materials from two main parts: one part is purchased from external aluminum rod enterprises, and the other part is produced by the company's recycling aluminum segment, which uses scrap aluminum to produce aluminum rods for various business segments [2]