I don’t know why China is so keen on helping Russia. Is this some kind of godfather deal and they want some massive ROI from Russia once things settle down a bit? Or is this some long-term strategy “against the West”?
What's not to understand? Russia is doing the pre-production research of how China will need to protect their economy when they put their military in Taiwan.
China will not get sanctioned like Russia has. The world's dependence on Chinese manufacturing is like Europe's dependence on Russian gas, times ten.
Or, more precisely, it will get sanctioned like Russia has, but like the Russian sanctions, they will include exceptions for everything the West needs to buy from China, which is nearly everything.