1. Amazon's fully managed operation model refers to the e-commerce platform providing sellers with one-stop services, including product display, customer service support, order management, etc. Sellers only need to be responsible for product selection and delivery, which greatly reduces their operating costs and technical barriers.

2. Cross-border e-commerce refers to the e-commerce business in which dealers sell products from domestic to foreign countries. Fully managed cross-border e-commerce refers to the cross-border e-commerce business model in which the e-commerce platform provides sellers with a full set of services.

3. According to relevant data, fully managed cross-border e-commerce has become the mainstream business model in China's cross-border e-commerce market, which can improve product quality, increase product added value, and bring good development to China's international trade.