You do realise that Taipei’s territorial claims are exactly the same as those of Beijing. I know the western media never bother to mention it because it doesn’t align with the approved narrative but Taiwan claims the very same nine dash line as China.
To this day, Taiwan remains firm in its claims to the South China Sea. They have been historically justified on the basis that, as there was no United Nations Convention of the Law of the Sea (UNCLOS) in existence in 1947, it was legitimate for the ROC to claim the South China Sea territories and waters based on the historical connections of these with China. According to the Institute for National Defense and Security Research (INDSR), a Taiwanese think tank, there was no legal impediment to the claim in 1947 and, for a long period, there were no challenges to the ROC’s claims from other countries.[4] They were largely ignored – except by the People’s Republic of China (PRC), which concurred with them.