Earlier quoted context omitted.
> Taiwan will reveal them at the very last moment when war is imminent. Ok, they reveal them. What is next? Nukes are not magic. They are just weapons. What do you think would happen once they are “revealed”? What delivery mechanism are you proposing? Should they be aimed counter-force or counter-value? (Meaning are they trying to shoot the chinese nuclear launchers or are they lobbing them into chinese cities?) How…
You detonate one over open waters and tell China to back down. If they do, problem solved. If they don't, at that stage it probably didn't hurt.
Taiwan can also draw a giant jellyfish in the sand on a beach and tell China to back down. If they do, problem solved. If they don't, at that stage it probably didn't hurt.
The trick is that once you demonstrated your capability (either nuke detonation or giant jellyfish drawing) you need to explain to your adversary how this capability is going to cause them pain they cannot bear. This part is unclear with your plan and mine too!