Originally Posted by Busbert
if you are not ethnically Chinese, you will not get Hong Kong Citizenship even if you are born and grow up in Hong Kong.
It's not possible under HK or Chinese regulations to hold more than one passport at once. It is possible to get HK citizenship once you have pernament residency if you renounce your previous nationality. Not easy, but possible. I know of an American who has done this - not paying US tax being his main motivation!