NK is just a UK branding, the same blight that already sees the exact same Chinese made bike being sold under 3 or 4 different UK brands, with the attendant "sorry, Computer Says No" insurance hassles (I speak from experience).
The CFMOTO 650 is not "designed" in China in any meaningful way. It's a Kawsaki ER6-n clone made of the usual random monkey metal and sporting a £4200 price tag, exactly the same as a Korean made Hyosung GT650 - which is itself largely an SV650.
Personally I don't find that price even remotely tempting, given the guaranteed depreciation, the parts and insurance lottery, the unknown longevity, and what I'd fully expect to be a "Nah, they all do that plus it's had unreasonable use, innit" joke warranty from the splatter of "down the industrial estate, round the back of the pallet fire" dealers who will stock it.
It's neither original, nor better than anything else, and worst of all, nor is it significantly cheaper. I've heard from one (1) dealer who got one (1) in, and had one (1) buyer lined up... but who then came to his senses. Sadly, no test ride report, he wants to keep it mint - which I read as: he's too nervous to ride it in case it falls apart before he can sell it.
Truth to tell, I hope that it does well and that there are loads of them around used in a few years, holding up well and going for bargain prices. But there won't be, not at that sticker price.