A label affixed to the outer surface of a commodity package, used to describe the composition of the commodity material, origin, weight, production date, quality, shelf life and other weight information. The commonly used labels on Amazon are FBa labels. Fba labels are divided into commodity labels and shipment labels, among which, fnsku, the English abbreviation of commodity label, is the sign of Amazon FBA to identify products entering the warehouse and putting them on the shelf. Extension label refers to the label posted on the outer box of the package with shipment ID fbXXXX plus number. There may be multiple boxes in one shipment number, which will be reflected in the shipment number 001,002, which is the outer packing box identification for Amazon warehouse to confirm the goods when receiving the goods.