China hasn't burnt its bridges with the West yet. Russia sure did. Russia is getting in a situation where China has a monopsony on them.Right now, it's a seller's market. China needs Russia more than Russia needs China.
China already considers Russia to be diplomatically irrelevant:
Chechnya, Georgia, Syria, Ukraine... All pretty much show the Russian trademark of "let's erase this city under artillery fire for weeks to teach them a lesson about wanting to be free".To top what you claimed, the Russians haven't gone around destroying entire countries either.