Fair point. However that does not help too much with getting gear within China.
Yeah mate, fair enough, I was just pointing out the fact that what you'll find in HK is not very different from what you'll find in Mainland.
Source check, source discussion, etc...are not allowed on this forum, just to let you know that you won't get precise information on this side here.
That being said unless you're looking for "exotic" stuff I would go straight to pharmacies in HK. Of course, don't go to Boots in Central
Use your head and visit the lousy pharmacies in Mongkok, TST, etc...Start with pharmacies nearby gyms, etc...
Mate, you're basically living in the AAS world factory, if you can't find gear there you won't anywhere else

I agree on the shitty reliability, but if you're smart and patient you'll find pretty much everything a juicer could dream of.