How much is the GST refund in Hong Kong?

Could you please clarify for me, what exactly is the current amount of the Goods and Services Tax (GST) refund that individuals or businesses can expect to receive in Hong Kong? I understand that there might be certain conditions and limitations associated with this refund, but I'm primarily interested in knowing the general amount or percentage that can be claimed back. Additionally, if there have been any recent changes or updates to the GST refund policy in Hong Kong, I would greatly appreciate your insights on that as well.