Hi Steyn and welcome to the forum,
DH Gate is a business directory, it's full of independent suppliers. When using their directory, what you are doing is dealing with those suppliers they have advertising with them. It's important to remember that these types of directories have all sorts of suppliers, some legit, some selling fakes and some just straight our scammers, so always do your home work on the suppliers you are thinking of buying from, never buy a branded item unless you are prepared for it to be a fake and always, always use a safe payment method, never a wire transfer.