I think nuclear escalation is the thing keeping russia and china from starting an all-out war. Russia has been employed to try to incrementally conquer territor

I think nuclear escalation is the thing keeping russia and china from starting an all-out war. Russia has been employed to try to incrementally conquer territory that China wants more control of, the challenge is to try to avoid nuclear war while doing so. I dont understand why china doesn't just buy what it wants, but maybe the cost basis has become important to keep their industry going.