Hahahaha, and I though we should talk about HISTORY... How the world spins these days ah?
Look, back to 60s and 70s, when first operationally "good enough" RPG of China that can DISABLE (not total destruction) Russian's workhorse MBTs like T62, that's as late as 1969; and when China's armour army groups were as good as non-existing; and forget about joint-operations between ground force and air force when Chinese army have had hard times to keep artillery and advancing forces tightly cordinated... China is the one scared and planning of how to continue to fight effectively after the CMC has evacuvated Beijing, AND THEY PLAN IT FOR REAL...
Now, sinophobia did its job to scare everyone to chill their bones and Russia, who effectively a semi-ally with China, which the offical terms is “全面战略合作伙伴关系” Total (or "Full Scale") strategic cooperative parternership, showing sugguestion (by forum threads like this one, across the globe), that "it is high time to plan for PLA invasion scenario".
I don't know, ground battle, esp ground battle between superpowers (both are "no more" or "not yet", though) and involves the sovereignty soil of both superpowers, one thing is for sure - the war is not going to stop by drawing a line between each defacto cotrolled ground and call it a truce.
So, if we are sober that "push inland" would not happen without a total war that guarantees full-scale nuclear exchange - which means not going to happen in today's foreseenable human ethic standard; then why bother (esp, the Russians soberly bothers) that "The Chinese are coming!" hype?
We do have this little thing called diplomacy successfully settled (CLARIFIED) all the China-Russia border issues - despite how pissed off each's domestic vox populi are outcrying about, don't we?