I think the OP has a problem. It's one thing to do it in US hotels which are pretty lax, but my understanding from posts on FT is that Asia properties are MUCH more strict on the rules, as mentioned above. If I were the OP I'd work on Plan B re: the stay in HKG & think about using the certs elsewhere. Otherwise the OP is opening up his family members/friends to a whole lot of mess in a different country & he won't be there to sort it out.
Cheers.