I think it's called irony, not plagiarism
That's the most humorous -and logical-thing to do if they really think that Cuppertino stole their design (which, to be fair, appears quite likely, as the main point of that article of yours ridiculing the claim was that the devices don't run the same OS -which is, as the claim was about design, pretty far from the point -"several thousand light years appart"-style far).
I mean, whether or not Apple stole their design -my take on this is "yes" but...- there is no way that this company could get justice from an US court (what with Apple pockets being bottomless and merkin IP system only recognizing merkin intellectual "property" -even when it's a blatant rip-off, when there's a metric ton of proven prior art or when the idea is so blindingly obvious that any 3-yo kid in human history probably came up with a similar idea).
So they choosed to flip the bird at Mighty Apple instead, probably making some cash in the process as I can totally see a lot of people parting cash for this, either for it's ironic value or not, especially in China. Mind you, I'm not even remotely Chinese and I would totally get one of those if they were available here, just fo' teh lulz. And chances are Shenzhen can get away with it, too. Which is the way it should be. Frankly that's hillarious, and it's only a skin (i.e. design) so it's appropriate retaliation, too.