Interesting that Samsung publishes results on PM2.5 and 0.1 micron testing, but doesn't say anything about 0.3 micron particles (the most difficult to filter) which is the industry standard. That type of results, many other brands of air purifier can produce.. don't even need HEPA-13.
But if you are only concerned about the haze... it works fine i guess. But the skeptical side of me thinks they are misleading the ill-informed that just because they can do 99% on 0.1 micron (with a testing time of 1hr) means any particles bigger than that will be the same or even better.
And why testing done by China when its made in Korea?
(1) the Samsungs have true HEPA filters, ie HEPA-13. As per standard, > 99.95% @ 0.3 microns MPPS. Just take that as more than good enough.
(2) It's nice to know that it can do 0.1 microns, "confirming" my earlier posting that HEPA-13 filters can easily handle 0.1 microns and somewhat below too. As sampled in Beijing, the haze particles predominantly range between 0.02 microns to 0.1 microns, sizeable amount between 0.1 to 1 microns.
Three, China has its own testing bodies as well. In fact Beijing has been using PM2.5 way before us here in Singapore, since 2010 I believe. That's thanks to the US Embassy who reported PM2.5 also when Beijing was still reporting PM10 (and as you'd know, huge discrepancy there)...so they had to follow suit due to fierce online debates not unlike here. That's 4 years more advanced than us.

Quite a few of their stuff have certification, ie fire extinguishers, weighing apparatus for jewelry/trading etc. Something like our PSB / CASE or something. This is due to the rampant "cheong" goods that do not perform according to spec and just emphasize on low price only.
In fact, Air Purifiers are in HUGE demand in China. Even HK SAR also, it's just that last year and this year our air purifiers sales caught up. Coz their problem is constant bad quality air in the form of smog, much worse than us. Some parts of China near Beijing kena 400-500 for many months in a stretch. Yes, we were actually "lagging" in this aspect.
3A, whether or not this cert and test result is also cheonged or bribed, that I cannot confirm.
Just take it as it is, pretty ok lah.....it's not a laboratory apparatus that we are buying here.