Most of my local Chinese freinds are holding HKSAR passport and other national passport(UK,Canada,Australia..). And my another non-chinese freind, he has applied for Chinese naturalization. After few months he received a letter of approval from HK Immigration Dept. The letter said that "As the documents you produced suggest that you may still hold other nationality, please let us have documentary proof that you no longer hold or have already renounced such nationality, as this is a requirement before the approval of the application for Chinese naturalization"
My question is why the naturalized Chinese should renounce the existing nationality and Chinese by-birth can enjoy the dual nationality?
Why the HKSAR Govt. is so reluctant to naturalized Chinese in this case?