As I understand it, you want nuclear powers to see, to a degree, the cards you are holding. Like in Dr Strangelove, a doomsday device only works if the other side knows about it. You want the other side to understand how badly they will lose if they decide to attack. And you can manipulate what information they gather.
This used to be even more common place until we left the Open Skies Treaty. Though I don’t think China was ever part of that.
