Hi
Is your method work in Hong Kong
Thanks
No, Sorry

Since you have a good vouch and ability to refund i will advise that you list the countries that this method can work this could probably help the potential buyers.
The issue is that I do not know 100% in which countries it will work and in which not. I think 2 or 3 times so far I needed to refund as i thought it would work, but it did not... Therefore i can not make such a list with confidence.
As I wrote before: Most of the European countries will definetly work, except from some south and eastern european countries. Australia will work.
I still do not know if it will work in the US properly. I had no customer, yet. I think it will also depend on the states.
Also I do not have much experiences with Asian, African or South American countries, but most of those countries will probably not work.
All Arabic, Middle East Countries will definetly not work.
With Bitcoin problem can be very little: Show us blockchain transactions and we will support you! Where is problem?