Visiting Hong Kong for more than 14 days, what kind of visa do I need and what is the process?

Tariq, you should apply as "Imported Workers". Do you have an employer in Hong Kong or does your company has an office there? If so, you can first send your passport, passport copy, filled-out application form, recent photo, medical report, and educational background proof to your employer. Then ask your employer to apply for it at the Immigration Office.