this is kinda idealistic, china doesnt actually have a way to push their forces into here. almost all of china’s military-based international efforts are via the UN. they largely keep to themselves, not only because of geography but because they are still neocolonized in areas like taiwan. if they lose their position, people have physical state entities to swap allegiance to. the statement could be better, but they still dont want to throw their emerging position away.

if you saw this sort of shit happening in SE Asia or Korea they would be involved from the outset. russia has more capability of doing things here even though theyre in a war. plus we also must remember that the soviet union tried military and arms intervention in this conflict before, but this was obviously unsuccessful despite their better geopolitical and geographic positioning.