i don't think so. the indian army would never make it out of the uninhabited areas of tibet even if they launched a surprise attack, then with supply issues trying to feed their men over the himalayas, and some softening up by the rocket and air force, the PAP could probably take out the invading Indian army without needing the actual army. might still need PLAGF though, for rescuing cowering indians that keep running away in terror into icy rivers and setting up hostials.
the south koreans will never make it past north korea.
The only real land threat is russia, but relations with russia are good so for the time being there are no worries.
I think that the issue with is that certain countries may engage in aggression against the UN recognized sovereign nation state of the DPRK, of which China is a treaty ally of. In that case the PLAGF may need to aid the ally in repelling aggressors and eliminating enemy capability for further waging war.