The concern with large numbers of Chinese entering Russia, is whether they will show any form of loyalty to their new home. Isn't the big concern for Russia that underpopulation might mean perhaps problems with China many, many years in the future?
The question you need to deal with is why did they move to Russian territory?
What brought them?
Lets face it, it could be for political freedom, to get a vote, for 1,000 people there might be 1,000 different reasons.
The point is, don't treat them as second class citizens. Don't try to screw them economically. Treat them as equals and they will work hard and make it a better place for all.
Give them citizenship, let them enjoy life and prosper, and work hard and have families.
Help them to learn Russian, and learn about the local culture and encourage them to take part in that culture.
If Chinese become the majority in Siberia, who's to say they won't cause unrest and political trouble many years in the future, and demand to become part of China?
If you treat them as foreigners, illegals, then they might decide they want an independent country, but like the Albanians in Kosovo, they wont want to expand China, just like the Albanians don't want to be ruled from Albania... a few radicals might, but they will remain a minority.
China is hardly going to support independent states in the region considering the situation in Tibet...
The problem is that pure Capitalism claims "the market solves everything". But that is garbage. Some centralised planning could see incentives for breeding, and within 30 yrs, Russia could have a massively larger indigeneous population, I think.
I totally agree that the capitalistic claims that markets self regulate is rubbish... little companies become swallowed up by bigger companies and pretty soon you have banks that are too big to fail... split them up into little bits and let parts of them fail then... natural selection.
Personally I don't think Russia needs a much larger population as that can create as many problems as it solves.
The real problems that need solving are things like proper infrastructure for everyone, and of course the old chestnut of the gap between the rich and the poor.
The other question is how Russia should compete with political, economic and military blocs, that are larger in terms of population.
By staying out of the WTO and making its own decisions about economic policy.
The WTO screwed NZ, we dropped all subsidies and government support for industry and most of it disappeared over night. Now everything we buy is from China.