区别是什么？
如果商品要在线上和实体店都进行售卖，那么条形码是必需的。条形码中的图形由一系列不同宽度的平行垂直线和空格组成，用于机器识别产品。另外，垂直线还对应于一系列可由专用扫描器硬件读取的数字。
条形码有很多种，包括广为人知的UPC（通用产品条形码）和EAN（欧洲商品条形码）。然而现在，许多零售商用GS1 UPC和EAN条形码进行库存跟踪和合规操作。
GTIN Standard
New Structure
GTIN标准
新结构
GTIN是零售条形码的新命名结构。EAN-8现在是GTIN-8，UPC-12现在是GTIN-12，EAN-13现在是GTIN-13，SCC-14现在是GTIN-14。这一变化使得在处理零售相关条形码时容易混淆。公司正慢慢适应这种新规则，但UPC和EAN这两个术语在当今的商业世界已经根深蒂固。
The European Article Number (also known as EAN) is a Global Trade Item Number standard describing a barcode symbology and numbering system. It's used in global trade to identify a specific retail product type, from a specific manufacturer.
欧洲商品编码（也称为EAN）是全球贸易商品编号标准，包括条形码和编号系统。 在全球贸易中，EAN用于识别制造商的零售品类型。
UPC-12 Standard
Used Worldwide
UPC-12标准
全世界通用
UPC条形码是最常用的条形码，广泛用于美国、加拿大、欧洲、澳大利亚、新西兰等国家的零售店和线上商店，比如亚马逊、Ebay、AliExpress、Jet、Shopify等。
Do you need a barcode for self-published work?
Do you need a barcode for self-published work?
As any seller knows, Amazon is crammed full with not just millions of different products but, millions of different variations of different products. Like in any other kind of store, each product sold on Amazon has its own unique product code (UPC) to help sellers and buyers quickly identify and catalogue each product.
Why do I need to buy UPC codes for Amazon?
If you want to sell a product on Amazon, that product must have a UPC, otherwise it will not be accepted for sale on Amazon.
