The Chinese civil war never officially ended. There was no agreement whatsoever, and the ROC never declared itself as separate, etc. Taiwan is simply a province within the ROC, and the ROC still consists of the mainland. That's what the ROC constitution states.
Comments
The USA invaded and annexed lots of free countries.
Invading and annexing isn't some weird thing no one usually does.
Taiwan is the product of a recent civil war.
Would you have argued that the American civil war was recent in 1940?
The Chinese civil war never officially ended. There was no agreement whatsoever, and the ROC never declared itself as separate, etc. Taiwan is simply a province within the ROC, and the ROC still consists of the mainland. That's what the ROC constitution states.