There is no selection of Hong Kong.
I also would very much like to use this but the lack of Hong Kong being selectable prevents, how can this be included?
+1 on this issue.
These maps are generated by a third party application ( as mentioned in the docs ). I do not create maps ( I'd have to make a LOT if I started to do that ). If someone wants to make a custom map, and create a Pull Request for it, I will be happy to merge it.