Hi, and welcome to the forum.

Unfortunately, I have no experience with Hong Kong so I can't really help you on your salary question. Have you tried googling any of the major financial journals or newspapers for HK, or scanning the job ads on Monster or any other job search site? Sometimes you can get an idea from job postings what is considered an "attractive" salary. (Obviously, they aren't going to advertise one that would be considered sub-standard.)
Cheers,
Bev