As for papers - HR personnel in HK traditionally ask to see all degree and certifications, plus letters from previous employers for proof of employment.
Now, I have always showed up and presented on the first interview the names and contact information of my professional references (about 4 people) on a nice printed sheet of paper. Also I have showed my degrees and certifications during the second interview.
During the interview stages do not give a salary expectations or state previous salaries as once you do you have capped your salary. Do not talk salary until you have been made an offer of employment and still let the company state first the salary and benefitsbest if they state it in a written contract before you start negiotating.
Good Luck on your interview.