Useful information for application of VISA for Extension of Stay in Hong Kong.
Application for Extension of Stay in Hong Kong
This page from the Hong Kong goverment website GovHK provides information on where to apply for extension of stay, the application forms and supporting documents needed, what to do if you cannot apply in person, how to submit the application online, how to book an application appointment online, how to enquire the status of the application online and the processing time.
Link: Application for Extension of Stay.
Also see How to go to the Immigration Tower in Hong Kong.
Public Forms for Extension of Stay & Transfer of Endorsement in Hong Kong
This page from the immigration department of Hong Kong provides information on the public forms related to application for extension of stay and transfer of endorsement.
Link: Public Forms Extension of Stay & Transfer of Endorsement