That doesn't help you if they have you in China and keep you from getting access to an embassy. Dual citizenship only helps if they actually recognize it, or your host country learns of your plight- neither of which are the case here.

*home country. Host country is the one persecuting.

This might just be my own strange way of thinking.

I haven't actual lived in my parents house in decades, and yet when I go there to visit them I still think of it as "going home".

In the case above, I assume we are talking about people born in China, who have left to live in another country, and are then involuntarily returned to China. In my head, China is still the home country.

All of that said, having read your comment, I just now realized that is and uncommon understanding of the words. Your interpretation is certainly closer to the emotional meaning of them for the people involved.

Generally speaking, if you are a citizen of country X and you are in country X accused of violating the laws of country X then any citizenship of country Y that you might have is irrelevant.

It's true even if you aren't a citizen of X. Griner isn't escaping prison by not being a Russian citizen. Neither are all the kidnapped Ukrainian children.

OK, but Griner at least receives consular assistance from the US government - she wouldn't even get that if she were a Russian dual-national.