Replying to [treasure]:
It's really very hard to clarify or identify the supplier only from some B2B website.
![[em24]](http://img.alibaba.com/images/eng/style/icon/emoticons_thinking.gif)
I work as a market sales for a chinese manufactur too, we are supplier, but sometimes, we also find some suppliers from alibaba.com who can offer us some components and accessories. So, my opinion is to visit their factories and make sure that the factory they showed to you belongs to themselves. After your visit, you can ask them to send their related certifications and licence to you.
![[em1]](http://img.alibaba.com/images/eng/style/icon/emoticons_smile.gif)
If you are looking for suppliers overseas, cannot visit your suppliers every time, then contact your country's embassy there, they are often willing to supply this service for you.