"waste plastics in municipal solid waste" refers to plastic packaging materials, tableware, bottles, films, toys, and other plastic products generated during residents' daily life and consumption. After being mixed into municipal solid waste, these plastics lose their original functionality, or although they have not completely lost their utility value, they are discarded. Through collection, sorting, cleaning, shredding, pelletizing, and other treatments, these waste plastics can be used as recycled plastic raw materials to produce plastic products, building materials, fibers, and fuels, thereby achieving resource recovery and utilization.