It`s true that there are many lions in China, especially on the websites. But still there are several suggestion for you:
Take the website Alibaba.com as a example (Alibaba.com is the largest online B2B marketing place, there are thousands of suppliers for you to choose from )
1.You could check the Buyers views. If you want to buy online, you can use AliExpress.com. Every item has buyers views, from which you could quickly know the quality about Epads.
2.Check the supplier`s feedback. You may find many Epad suppliers at AliExpress.com. and by clicking the store name, you could easily see their feedback. Choose the high feedback supplier
Use escrow to pay your products. Online business always has huge risk. As far as I know only escrow could take a good protection for buyers, because when use Escrow, money only released to suppliers upon you feel satisfactory with your products