Dhgate is just a sourcing site for products, same as alibaba.com and tradekey.com, they all feature independent businesses, unfortunately those businesses also feature fakes by the thousands.
I'm pretty sure the advice you will recieve here is that you will not be able to purchase a genuine brand name product from any Chinese manufacturer, you will be buying fake.
These sites are great if you are just chasing a no name product, you can find some excellent distributors, but you are asking for trouble looking for name brands from China!
Just my opinion of course : )