And speaking of the ROC Marine Corps, the ROC claims more parts of the South China Sea than the PRC (11 dash line vs 9 dash line), but unlike its claims of Mongolia, which is treated as a joke that no one takes seriously, the ROC is very serious in its pursuit of its claims to the SCS by building naval bases and holding regular naval exercises. Here's Vietnam diplomatically telling the ROC to fuck off from the Spratly Islands.

A Republic of Taiwan has no conceivable grounds to pursuit any claims to the SCS because the SCS is nowhere close to what the territorial waters of a hypothetical ROT would be and a ROT is not part of any international treaty which a ROT could use to justify de jure control. But it's not claiming the SCS as a ROT but as the ROC. And unlike a ROT, the ROC as China does have international agreement which would give it de jure control over the SCS. This is how you know Taiwanese separatism is farcical. It's all "Taiwan is culturally and politically distinct from China" until the SCS is involved then it's suddenly, "aktually as the Republic of China, these are Chinese water and thus our territorial waters since we are the Republic of China you see." But then again, what else do you expect from the political (and literal) descendants of Japanese fascist collaborators who (not so secretly) wish they were Japanese?