Section 3 and AliBaba Supplier/Manufacturer….

I was testing couple of items on Amazon by sourcing sample or less quantity items from Alibaba. Now I know what to sell. I shared Amazon Section 3 documents with the supplier and they are ok to follow it. But I feel they are not manufacturers but more of suppliers and can take care of invoice. M just worried how to tackle this because when I checked couple of manufacturers, their MOQ is 3000 qty