The HKID will only entertain an application for a Reconsideration of a decision to refuse an application if there is significant additional, new information adding weight to the original application or relevant and important new facts which have come to light since the refusal – with comprehensive verifying documentation to support.
This means that you need to be ready to further argue your case stridently and have the bullets ready to fire in support. Emotional appeals are fruitless; as are a collection of mere testimonials from your consulate or chambers of commerce.
There are typically five key underlying reasons why cases get denied.
It could be that the case was destined to fail from the get go as the applicant was incapable of passing the approvability test applicable to the visa type applied for.
It might be that the case was very poorly put together or incorrectly argued.
Often times, applicants are unable to come up with critical supporting documentation required by the HKID or other specific information requests are not adhered to.
Finally, if the applicant has a poor immigration record in Hong Kong the Immigration Department could be minded not to afford the applicant the privilege of residence.
You should submit your application bundle for the Reconsideration in the same way as you submitted your original application.
If you are a Visitor in Hong Kong, dont; expect the HKID to afford you an interim extension to your current period of stay pending the finalisation of the Reconsideration process and notification of the outcome.
Things have tightened up considerably in the last couple of years, so you can expect to have to wait out the latter part of the Reconsideration exercise from outside of the HKSAR.