1. Is there any difference between "nationality" and "citizenship" in law?

1. Is there any difference between "nationality" and "citizenship" in law?

In Hong Kong, the terms "nationality" and "citizenship" have more or less the same meaning for legal purposes. The Nationality Law of the People's Republic of China uses the term "Chinese national", whereas the Hong Kong SAR's Immigration Ordinance(Cap. 115 of the Laws of Hong Kong) uses the term "Chinese citizen".