>> how is it different from those we have in North America?
Hong Kong interviews can be very different and bizzare depending on where you're from and who is doing the interview. Most of the discrimination laws, that prevent US interviewers from asking 'important' questions do not exist here in HK.
>> I've heard people need to bring in some kind of references or testimonials or whatever crap...
You mean to say your HR department in the US does not run criminal / credit checks on potential employees? 
This really depends where your application was sourced from. When we've used top end recruiters, we expect them to have done that checking, before the first interview. Also, people who have come recommended from trusted sources rarely need to bring their degree certificates in. The more "experienced" you are, the less documentation you'd be required to provide.