Actually I think both mainland China and Taiwan, read the Peoples Republic of China, and the Republic of China, BOTH consider themselves the rightful leaders of China.
All of China. And Hongkong.
Mainland, and Taiwan. At least that is my understandind, having lived on both sides of the Taiwan Strait. Though that was the case a long time ago.
They BOTH consider themselves, to be in charge of it all.
Recently, there has been a tendency for some on Taiwan to consider themselves part of a free and independent country, but there is still a significant part of the Taiwan government, who think the island is the free version, of the entire Chinese government.
Two competing systems of government, even now.
“Actually I think both mainland China and Taiwan, read the Peoples Republic of China, and the Republic of China, BOTH consider themselves the rightful leaders of China.”
You’re 30 years behind the times.
After Chiang in 75 and his son in 88, died, Taiwan ended all that crap.
They do not claim that and haven’t for 30 years.