J-10s are for sale to foreign governments, so showing them to the Russians doesn't pose any more risks than Chinese-adapted SU-30s.
No export of J-10 has taken placed so far. But then again only PLA gets to decide what they want to send to Russia and we can only speculate their reasons.
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These two Communist plutocrats are gone, but Xi Jinping and Wang Qishan are still hunting down their network of corrupt generals and commissars.
It's good to see Chinese government is cracking down on corruptions. So does cracking down on plutocrats make the government not a plutocracy?