The similarities are that all three are cross-border e-commerce platforms, and their customers are all overseas. All three have certain language requirements for sales.

Amazon has overseas warehouses, and domestic merchants can first send goods in bulk to Amazon warehouses. If a customer places an order, the overseas warehouse will directly ship the goods to the buyer. The main way for merchants and buyers to communicate is through email. AliExpress is similar to domestic e-commerce platforms. Although it is also aimed at foreign customers, this platform can be like a domestic platform, and buyers can chat directly in the form of questions and answers.

eBay is similar to Amazon, and the main way of communication is also through email. eBay basically ships goods from China to foreign countries through cross-border logistics, and there are no overseas warehouses.