Originally Posted by
hkskyline
^ Well, that effectively means Hong Kong does not recognize dual citizenship because if a foreign passport is used to enter a 3rd country, Hong Kong and China will not exercise its duty to provide consular assistance, meaning that person is no longer a Hong Kong citizen.
Originally Posted by Ragnarok
However, they will not be entitled to consular protection in the HKSAR and other parts
Relevant part bolded. Not a third country, HK or the mainland itself. In such a case, the other government can't help you if things go wrong. Which is standard practice as far as I know.