China currently cares most about the East till the natural resources.
The East because they are blockaded at sea currently, if they would invade Taiwan.
And they already have huge economical leverage there.
Russia is basically falling apart. But in a dictatorship, stuff like that is only seen sudden, when it collapses.
Putin seems to be making many of the mistakes of pre 1991.
> China currently cares most about the East till the natural resources
The simplest solution would be to reboot the Siberian Republic [1] as a Chinese suzerainty. Ideally after Putin dies as part of a deal to the new ascender. Maybe together with giving them personal co-ownership in some major ventures there.
> East because they are blockaded at sea currently, if they would invade Taiwan
Siberia and Outer Mongolia remain closer and thus cheaper and more-secure sources than anything coming in over ocean, which in essence means from Australia, South America or Africa.
[1] https://en.wikipedia.org/wiki/Siberian_Republic_(1918)