I agree with you about DH Gate. We should not recommend Dh gate to any one who wants to be part of resale business.
DH Gate is nothing more than a supplier sourcing site, just like the others such as Alibaba, Tradekey and so on. They are designed to link buyers with sellers, nothing more, nothing less.
When you do business on any of these types of sites you are doing business with independent suppliers, not with the site owner.
It is upon you to research the business within the site that you are interested in doing business with, not just assuming that they are fine because they are listed on DH Gate, or any of the others.
Most issues arise from people trying to buy genuine branded items from suppliers positioned on these types of sites, finding that the products ordered fall short of buyers expectations.
You can buy some really cheap and rubbish copies in China, you can also buy some top quality copies in China, but what you can't do is buy a genuine brand name product direct from a Chinese manufacturer!
9 out of 10 times the buyers create the problems for themselves with this unrealistic expectation that China is the source for cheap branded products. Yes, most everything is made in China these days, but it is made under licence for resale through the copyright owners own distribution channels, not those of the manufacturer themselves.
Doesn't it stand to reason that if the actual manufacturer was selling the branded products that they were manufacturing for some company, that they would be able to under cut the companies own prices and put them out of business over night?
If you want to buy unbranded items, then sites like DH Gate can be a valuable resource when you carry out effective research, but if you looking to buy branded items from these types of sites then you need to take a serious reality check because you are only kidding yourself!