[neffy]

There are two as it happens - the other one is Eastern Russia - ethnically asian, although not Han. Notice how Putin is always present for the pacific exercises, even when one might think he had better ways to spend his time on the western front.

[casenmgreen]

It is logistically impossible for China to invade Russia.

Additionally, Russia is important to China, in that the war with Ukraine supports Chinese goals.

Also note the Chinese build-up is of capabilities for a cross-channel invasion of a nearby coastline.