Hong Kong, Macau and Taiwan
The People's Republic of China considers both Hong Kong and Macau to have always been its territories, and people born in either territory before or after their transfer of sovereignty to China are regarded as "born in China". Those who are of ethnic Chinese origin are Chinese nationals before and after the handovers. Likewise the People's Republic of China considers Taiwan to be its territory, and people born in Taiwan are considered to be nationals of the People's Republic of China. Conversely Taiwan recognizes most residents of mainland China to be nationals of the Republic of China, but as not possessing right of abode in Taiwan.
Read more about this topic: Nationality Law Of The People's Republic Of China