How to prepare the envelop for standard mail in Hong Kong? Is is similar to the US mail format ( http://www.bsd.ufl.edu/maildocdata/OnlineMailGuide/PrMail.htm )?
You can check the "Method of addressing" at Hong Kong Post website:
You can also can check the detailed requirements for standard mail from Hong Kong Post:
As from my own experience, the US format addressing mails can also be successfully delivered.