The red trash can generally represents the trash can in harmful waste. The red trash can represents harmful waste, and orange is occasionally used in some places. Hazardous wastes include waste batteries, paints, lamps, cosmetics and other harmful substances that cannot be recycled and have certain pollution.

Kitchen garbage. Green. Recyclable materials. Blue. Hazardous waste. Red. Other rubbish. Grey recyclability refers to domestic garbage suitable for recycling and resource utilization, such as waste paper, waste plastics, waste glass products, waste metal, waste fabrics and so on. Recyclable materials mainly include newspapers, cartons, books, advertising leaflets, plastic bottles, plastic toys, oil drums, wine bottles, glasses, cans, old iron pots, old clothes, bags, old dolls, old digital products and old household appliances.