Come on. However absurd or sick threatening people of canceling their citizenship is, who in their right mind would accept to lose one's citizenship over a job? Knowing that they probably don't have a chinese citizenship either, meaning that not only would they be stuck in China but without a citizenship.
Wouldn't China offer citizenship and other incentives to stay to such critical personnel, especially if they are ethnic Chinese ?
China's rules seem to indicate that only people with at least a little Chinese blood can become Chinese citizens. However, there appear to be people with no racial connection to any place within the area of modern China that have Chinese passports. One thing they don't support is dual citizenship.
I can talk about that. My kid is Chinese but allowed to have double nationality by my country and in China because one of his parents is foreigner.
Although when he is 18 he will have to choose one. Regarding me if I'm not mistaken if I want I can apply for Chinese citizenship if I spend 7 years in this country and work here/pay taxes. Although I will have to renounce my Portuguese citizenship (with a legal document from the Portuguese embassy proving that).
But there is a catch: there isn't a shared system between Portugal and China (same as between US/Canada and China and most European countries) so China only knows what you tell them or have documents to prove. If China reaches the Portuguese embassy to ask for info about me, my embassy denies providing it, including criminal one because there isn't an agreement to share such info (don't know about other countries).
The only way is by they requesting and I asking and providing it. So it means my kid, as most rich Chinese, can keep both citizenships, same as the daughter of the Huawei owner who had Chinese, Hong Kong and Canadian citizenship and others who have Australian or US.