Here, "aluminium scrap, post-consumer, prepared for melting" refers to scrapped aluminium products generated in residential, commercial and industrial consumption, such as packaging containers, building profiles, vehicle components and household products, which, after collection, sorting and preliminary treatment, are in a condition ready to enter the melting process as post-consumer aluminium scrap. Such aluminium scrap has lost its original function in use but still has relatively high metal recovery value, and can be directly used as a feedstock for aluminium melting in the production of recycled aluminium and related aluminium alloy products, achieving resource recycling.