If you can deduce that the seller will honor his word with the warranty when things hit the ceiling(it means that things went bad) then you can use them without any issues. I assume you got a receipt with the warranty period stated...?
In fact we're going to have to wait out until CES and Computex to see if Kingston decided to launch some new colors for their HyperX lineup. If they are indeed available in China(like the White Fractal Define Nano S is only available in Japan prior to 2017, now in 2017 International availability) then you're fine but even if a search turns up with nothing then it's possibly a fake with some heatsinks slapped onto it.