wish在品牌授权备案时，是选择自己有UPC好呢，还是选择没有UPC好呢？

Have you purchased UPC, EAN or JAN for all your products?
Do you need UPCs or EANs to sell on Amazon?
Yes
No
Select the type of unique identifier for each category that you plan to sell
Why do you need a unique identifier?

Sports & Outdoors

Manufacturer Part Number