Nobodys talking about that.
If that really happened, I find it difficult to believe that, in the years since the fall of the Evil Empire, no memoirs have been written to brag about it.
Most of the people involved are dead - and we’ve actually done this topic on FR before. Someone posted the seismograph record from one event - nuclear detonations are unmistakable.
For that matter, neither the Russians nor the Chinese are talking about the regular conventional aspects of their border wars, either.