Naturally, the best way is to not get rejected. How? You should try to understand all the strengths and weaknesses of your application and highlight those strengths and downplay those weaknesses when submitting the application.
But what to do in the worst-case scenario?
The two options are:
– apply for reconsideration
– appeal
RECONSIDERATION
You can apply for reconsideration of your application. The grounds for this are that you have significant additional and new information added to your application.
For details and step-by-step instructions, go to http://www.hongkongvisahandbook.com/home/hong-kong-application-reconsiderations/
APPEAL
If your reconsideration attempt fails – you can try the final appeal. You have two alternatives here:
– Immigration Ordinance Review (presupposes the review of your application by a higher-ranking officer)
– Judicial Review (presupposes the intervention of court on the proceedings of HKID)
For details and step-by-step instructions, go to
http://www.hongkongvisahandbook.com/home/hong-kong-final-appeal-options/
These procedures tend to be expensive, burdensome and time and nerve-consuming and only in rare cases these options are suitable and recommended