I'll take a bit of a stab at that. It's a good question.
Taiwan is a proud jurisdiction. Taiwan will not accept, in effect, being a sub-designation of the PRC, if I understand the gist of your question. On the other hand, we cannot bring ourselves, under the one China policy, to refer to the Republic of China, or to....
With such arrangements, we can talk about a territory, but never about the People's Republic of China. It has to be Taiwan. These people will never accept the idea of being a subdivision of the People's Republic of China.