Nationality law of the People's Republic of China East Asian nationals of Chinese ethnicity are not Chinese nationals (although some may qualify for nationality of Taiwan) through their Chinese grandparents. British National (Overseas), a status currently held by many Hong Kong residents, is considered a type of British nationality by countries other than China, nearly 3.4 million Hong Kong residents were registered as BN(O)s before the handover of Hong Kong. Most of those people also have Chinese nationality, making them one of the largest group of dual nationals in the world. Portugal has never created an various classes of nationals nor has Portugal revoked Portuguese citizenship from Portuguese
The Quality of Nationality Index proportionately on the basis of the ranking scale used by the GPI. External factors identify the quality of opportunities and diversity the holder of a nationality can pursue outside the country of origin. Diversity of Travel Freedom is based on how many destinations the holder of a particular nationality can visit without a visa or with a visa-on-arrival for short-term tourist or business purposes. The data is sourced from the International Air Transport Association IATA. The diversity of Travel Freedom accounts for 15% of the total QNI General Ranking scale. Weight of Travel Freedom evaluates the quality of the travel