Amazon's cross-border e-commerce belongs to the C2C (Consumer-to-Consumer) model, not C2B (Consumer-to-Business). The C2C model refers to transactions between consumers, while the C2B model refers to transactions between consumers and businesses. On the Amazon cross-border e-commerce platform, individual or corporate sellers can sell products directly to other consumers, and Amazon, as a platform, provides support services such as product display, order processing, payment and logistics. Therefore, Amazon's cross-border e-commerce belongs to the C2C model.