Old post boxes from Hong Kong

I received this postcard with old post boxes from Real from Hong Kong, who was in Warsaw (my hometown) last winter :) Pls take a closer look to the stamp, as  although it is difficult to see this, it has marks (dots) for sightless people. This is amazing. We certainly don’t have stamps like this in Poland. I hope polish post office will finely think about handicapped people some day and not only about those, who cannot see. More postcards from same designer here.