Hi Peter, the website you are talking about is a b2b directory. It's like D H Gate, Alibaba, Trade Key and so on, they list independent suppliers who advertise their products.
You have to concern yourself about the suppliers within the site, not the site itself. As I said, each supplier is independent, and while these types of sites have some excellent suppliers, they are a magnet for scammers because they know just how popular these types of product sourcing sites are in the west.
I see you mention phones, if they are branded mobiles you are talking about, then they will, be fakes at best, complete scams at worst.
I would suggest really brushing up on what to look out for when dealing with business in China, and you will find a stack of useful information regarding that subject spread through the forum.
Cheers