Related special documents: certificates of origin, composition content reports, MSDS, solid waste identification reports, etc. 

The packaging method for recycled raw materials can be in bulk, packed, or compacted, etc. The packaging method, size and weight are determined through negotiation between the supply and demand parties. During transportation, different types of bulk raw materials should not be mixed. The transportation and storage of raw materials should have measures to prevent rain and snow. 

The recycled raw materials must not contain explosive items such as abandoned bombs and artillery shells. They must also not contain sealed containers, pressure vessels, or hazardous substances as stipulated by national regulations. 

Customs inspection "observation, listening, questioning, palpation" working method: 

Inspection: Visual examination involves observing the shape, particle size, color, and condition of the goods. High-quality ores have uniform color, uniform texture, are clean and pure without impurities, and emit a charming glow. If the colors are diverse, the shapes are different, and they are dull and lack luster, it may indicate poor quality or even the presence of solid waste. The inspection officers can make a preliminary judgment on whether the imported copper ore matches the declaration and whether there is a risk of solid waste based on the sensory inspections such as observing the color, particle size, and impurity content of the goods on-site. 

Wen: Detecting the odor of goods at close range. Most metal ores are extracted from natural mineral veins. They have a metallic smell or have been influenced by the elements and nature's smell over time. If the odor is strong, it is likely to be sulfided ore or processed slag, which poses a higher risk. 

Question: Ask the consignee about the origin, mining, production, and processing methods of the goods, and understand the entire history of the copper ore. The distribution of global mineral resources is highly uneven and relatively concentrated. Understanding the source can roughly determine the quality of the ore. 

Chai: Based on the above circumstances, a comprehensive assessment was conducted, and by using radiation detectors and other related equipment as well as laboratory test results, a "pulse diagnosis" was carried out. Ultimately, a scientifically accurate and reliable diagnostic conclusion was reached regarding whether its quality and environmental protection meet the requirements of the state.