Goods that you order must have a product code.

【code】你订购的货物肯定都有产品代号。

Basically, whatever space that isn’t filled by the company prefix, with the exception of the 12th digit, can be used for product codes.

基本上，除了第 12 位以外，任何未被公司前缀填充的空间都可以用于产品代码。

The product codes, living here between the company prefix and the 12th digit, don’t really have a common standard so each company can set their own codes.

位于公司前缀和第 12 位数字之间的产品代码并没有真正的通用标准，因此每个公司都可以设置自己的代码。