There is, however, one country with an imperial past and a renewed craving for empire that has territorial ambitions which make of it a threat to Russia, and that country is China...The majority of those who live there [Siberia] today are not Russian. Many of them are Chinese who have journeyed north in search of well-paid work; and China, which is just across the border from Siberia, is an economic juggernaut increasingly desperate for resources of the very sort that are found in abundance in Siberia.
Vladimir Putin should think hard about the precedent he is setting in the Crimea. The day may come when China does to Russia in Siberia what he is trying to do right now to the Ukraine in the Crimea. Putin's government piously states that its only concern is to protect the majority Russian population in the Crimea from the Tatars and the Ukrainians there. China, in time, will say the like about the Chinese in Siberia. And when that day comes, he will have alienated everyone of any significance who might otherwise have rallied to Russia's defense. [Emphasis added]
More on Putin's folly.