Uhhhh 0_o
That seems like a good reason in its own right... Right? That said, they're suffering a lot of consequence at the moment so it's worth letting that pan out. The west drastically overestimated their capability, by that standard NK is a world power. I get it, I don't think your position there is wrong but...semantics.
>China is not going to [go to] war with Russia against the US
Never claimed that. The game for China is if they don't provide material aid, they get to maintain better relations with the west. I think the west broadly misunderstands their goals for international standing. They want to be recognized but if push comes to shove they'll just buddy up with Russia. Best to not provoke that. If the US decides to world police some more, along with three EU, that makes world policing the standard for world power and China will happily rise to that. They're very much watching what we do here.