Well, since your parents still have each other, so if you're really toying with this idea of moving back to Asia, wouldn't it be now then later?
And if they are much older, maybe you could then consider moving back to Denmark? Of course, I guess explaining to them is the hardest thing to do.
Love's suggestion is very good too! So you could take some videos when you're in Asia and show them your life there.
Hope you'll get out of this dilemna soon and lead the life you want, though I can understand how at times we can't have the cake and eat it too.
All the best Phi!
P.S But hey, I thought the concept of parents wanting to stay with their children is an Asian thing? 