Oranges from China..

I'm wondering, with all the flak about food from China, should we be scared of ALL food from China, including fruits? I'm eating oranges from China right now and they taste really nice and sweet surprisingly. But what concerns me is that they don't look like any oranges I've ever had before..first of all the color is really strong, like fiery orange color, not the usual light orange that most oranges have, and the other thing is the shape, they look kind of like orange colored lemons actually so I don't know whether they were interbred or GM (Genetically Modified) oranges, or whether it has to do with the way they're grown. Regardless, they taste great but I'm just wondering whether they're safe to eat..