It is stipulated that mail must be returned within 24 hours, and mail refers to documents processed by delivery.

Amazon is committed to becoming the most "customer-centric" company in the world. It has become the online retailer with the largest variety of goods in the world. Amazon and other sellers offer millions of unique new products, refurbished products and second-hand goods, including books, movies, music and games, digital downloads, electronic products and computers, home and gardening products, toys, baby products, groceries, clothing, shoes, jewelry, health and beauty products, sports, outdoor products, tools, automobiles and industrial products.

At the same time, it is easy to see the contents and news of other pages in each page, classify different commodities, and implement different marketing countermeasures and promotion methods for different electronic commodities.