This is a great April fool's joke, IMO. Russia wasn't a big economy before the war, and now it's only getting worse.
True, but they compensate economical weakness with military strength, which is abundant in Russia. That is the way to conquer new territories and develop economy.
Sanctions have affected Russian economy significantly, and you can look at ruble's value, at Russian YouTube videos about the prices in supermarkets, at the very least, to see how it's going. And sanctions aren't over, new packages are being prepared all the time.
Hopefully this can slow down Russia on long run, however nothing is certain yet, because the more precarious the local economy becomes, more threatening and desperate Russia will be to the world following the "kamikazi" style.
As for China, it's a strong economy, but it's heavily based on a difficult interdependence of China and Western countries. And the US already had a talk with China, reaching a level of understanding that China isn't to help Russia evade the sanctions if it doesn't want harsh consequences.
Also, China isn't a fan of brute force, not really. They prefer the economic and political wars with the West, not outright invading sovereign nations like Russia decided to do, and China is somewhat competing for influence with Russia in the region, so their interests aren't fully aligned. So this new order, thankfully, won't happen.
You are right, but it doesn't mean China can't become aggressive at some point. China has this stance towards the world mentioned by you because it's the most interesting and profitable thing to do for now. But if they glimpse there is a good chance to enslave another nations, just like they do with their own people, they are going for it, without any doubts.
Russia and China are united by tyrannical ties and will only turn against each other once the free countries are under their domain.
I hope this new order doesn't happen, although it's a fact the intention in achieving this exist.