> The CCP authorities believe "One China" to be the "People's Republic of China"..., we believe "One China" should refer to the Republic of China, founded in 1912 and persisting to this day.
and its affirmation in 2012 by the then KMT administration:
> 兩岸確已達成「一中各表」的共識，這是客觀的事實，我們主張的「一中」當然是中華民國。
> The two coasts have already reached a mutual understanding on "One China, Said Differently," of course the "One China" we support is the Republic of China.
It's very much the idea that the ROC should control everything.
Now as other comments point out, public perception among KMT detractors is that this is a sham, and even among KMT supporters there's not a clear message on how this situation would ever come about (and the main criticism in Taiwan against the KMT is that the only way that the KMT could ever hope to make this happen and indeed is/was doing in effect is by essentially capitulating to the PRC), but this is what the KMT puts out on official channels on what "reunification" means for the ROC.
> 中共當局認為『一個中國』即為『中華人民共和國』...，我方則認為『一個中國』應指1912年成立迄今之中華民國
> The CCP authorities believe "One China" to be the "People's Republic of China"..., we believe "One China" should refer to the Republic of China, founded in 1912 and persisting to this day.
and its affirmation in 2012 by the then KMT administration:
> 兩岸確已達成「一中各表」的共識，這是客觀的事實，我們主張的「一中」當然是中華民國。
> The two coasts have already reached a mutual understanding on "One China, Said Differently," of course the "One China" we support is the Republic of China.
From the Taiwanese government MAC: https://www.mac.gov.tw/News_Content.aspx?n=B383123AEADAEE52&...
It's very much the idea that the ROC should control everything.
Now as other comments point out, public perception among KMT detractors is that this is a sham, and even among KMT supporters there's not a clear message on how this situation would ever come about (and the main criticism in Taiwan against the KMT is that the only way that the KMT could ever hope to make this happen and indeed is/was doing in effect is by essentially capitulating to the PRC), but this is what the KMT puts out on official channels on what "reunification" means for the ROC.