Blackstone
Brigadier
Again with the allusion to the supposed Chinese nefarious design on Siberia, I don't know how many time someone has to point this out, China doesn't want a large stretch of a frozen wasteland. Any resources in Siberia can be purchased through a mutually agreeable price. With Kiev in the bag, US led NATO also has a shared border with Russia.
You could say China has no designs on Siberia or any other part of Russia today, but you can't know what Chinese intentions will be 10, 20, 30, and 40 years from now. The lack of knowledge of future intentions drives nations to hedge against other nations, especially next door neighbors with history of conflicts. That's why Sino-Russo relationship is inherently unstable.