The term "waste polycarbonate" here refers to polycarbonate and its products that have lost their original functionality due to aging, damage, performance degradation, or technological obsolescence during the production and use of plastic products, electrical and electronic equipment, automotive components, and construction materials, or that, although not entirely devoid of utility value, have been discarded. Through collection, crushing, washing, sorting, and melt-reprocessing into pellets, this type of waste polycarbonate can be used as recycled plastic feedstock for the production of electrical and electronic housings, automotive parts, construction panels, and other plastic products, thus achieving resource recovery and utilization.