What I understand from reviews of Chinese binoculars and my own experience with Chinese scopes is, sometimes, very variable build quality. In the production some will be abysmal and others very good for the price. The design is often a copy of a successful model from some other country, like Japan, but there is little to nothing in the way of quality control. So, when you get your Vortex binos inspect them carefully for optical and build faults and, maybe, use the Vortex guarantee process if the binos are not as good as it says on the box. I had several Bushnell Chinese scopes. I don't have any of those now but I still have a couple of Chinese Hawkes and a Vortex.
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