ASIN code (Amazon standard identification number) is Amazon's own product number, which is automatically generated by Amazon system and does not need to be added by the seller. ASIN code is equivalent to a unique product ID, which is unique on Amazon platform. ASIN corresponding to the same product and UPC of different sites are usually the same, that is, one ASIN code corresponds to one SKU. ASIN code can be used to query goods at the front end of the platform and the background of the seller's shop.