Why do you need a registered office address for Hong Kong company?
According to Companies Ordinance of Hong Kong, each limited company must hold a registered address in Hong Kong. A Hong Kong company may maintain also another business address, but a registered one in Hong Kong is the obligatory requirement under law.
The government needs a Hong Kong registered address of a company for official communication.
If you do not plan to rent a real office in Hong Kong that is a really quite an expensive option, then you can not skip on a registered address service if you decide to set up a company in Hong Kong.
A company that provides a Registered Office Address Service in Hong Kong must hold TCSP licensee.