Now I agree that China should expand its nuclear arsenal if doing so can ward off a war between China and the US.
What I have a problem with is the view that:
1. PR is dead, and
2. China will have the time to grow until it completely outmatches the US
I think these two statements are contradictory. I think AR will happen if the US provokes a war before (in their view) China grows more powerful than the US. If that fails to materialize, and China does indeed grow to outmatch the US, then PR is the more likely possibility.