Tery is right about Hong Kong. The way its run, as well as its considerably noticeable differences from China, it might as well be considered its own country, if all the other facts that Tery noted weren't taken into consideration.
I thought you would refer to a foreign country as another country other than the one you're living in presently. Like, living in Canada, I would call South Korea a foreign country, but if I was living in South Korea, I would call Canada a foreign country, regardless of my birthplace. That's how I always thought about it o.oCan you really consider your birthplace a foreign country? Not being snarky, it's a real question I'm asking.