Because the packaging weight of the product uploaded by Amazon refers to the weight of the product itself with the packaging, not the weight of the package. The package weight also takes into account factors such as packaging, fillings and shipping costs, so it is not equivalent to the uploaded product packaging weight. Sellers need to pay special attention to this when uploading products. In addition, the exact requirements for Amazon's uploaded product packaging weight vary from country to country or region. Sellers should carefully read Amazon's guidelines when posting products or consult Amazon customer service to get accurate information.