Since you are looking specifically for real Chinese jewelry manufacturers rather than trading companies, I screened this differently from a generic Alibaba/Made-in-China list.
I focused mainly on 316L stainless-steel jewelry factories, because that matches your previous requirement. I also excluded MOUMOU from the recommended list because of the factory-ownership issue you previously identified.
20 Chinese jewelry manufacturers to investigate
The important distinction is that “Manufacturer/Factory” on a B2B platform is not enough by itself. Some companies simultaneously operate as factories and trading companies, and some have a factory relationship that needs to be verified.
One important point for your research
I would not rank these 20 simply by website claims.
For your purpose, I would verify each company against five things:
Legal entity → actual factory address → factory ownership/lease → production equipment → production workers/processes.
That would eliminate exactly the kind of situation you previously found with MouMou, where a company presents itself as a manufacturer but the underlying factory history does not support that conclusion.
For example, Chengfen Jewelry claims a Dongguan factory with CNC and PVD equipment and 7 million-piece annual capacity, but I would still put it through the same ownership/address verification before treating it as a confirmed factory.
If your goal is 20 genuinely self-owned/self-operated 316L factories, rather than merely 20 suppliers, I can take this list one step further and investigate the Chinese legal registration, establishment date, registered address, factory address, ownership/relationship, factory size and whether each one is actually a factory. That would be a much more useful list for serious sourcing.
