Definitely not gonna happen, it's generally not of Chinese character to debase ourselves by giving vast majority/all benefits to a relatively unwilling Russia just for the slim hope of being helped in such a convoluted, indirect, and unwarranted way in a vastly complex system that is geopolitics. Chinese, in general, prefer to take it into our own hands when it comes to helping ourselves, self-strengthing is the best self-help. Also, I think Chinese in generally pay a lot of attention to attitudes(vibes), if the "vast majority or even all of the benefits will go to Russia", I think the vibe check would automatically fail. You know, all the fuss about goodwill in business.
What is a couple of benefits here and there if Russia manages to prolong its fight with the West?
We should take into account the greater picture. We act as investors, we invest in Russia because we know that the payoff from drawing West's attention away from China will generate >1000x the return.
In fact, if you think more about it, we are extremely lucky that Russia entered into this war. Do you remember before the war all the plans and discussions that US/EU were doing about how to collectively deal with China lol.
Given Western attitudes, I hope that this war continues, and even expand to more regional (European) countries next to Russia
The more Russia gets West's attention away from China the better. For all I care, Putin can expand his war to the whole Europe as long as this serves China's interest in getting breathing space to develop
If it only takes some benefits to flow to Russia for this to become a reality, then no problem, give them away.
All in all, China is not and will never be a charity. People mistake these benefits as charity, wrong! We invest and invest in the hopes for magnitudes of order greater returns in the future from our original tiny investment.
Back to the topic, imo Russia's involvement should be reduced accordingly to reflect the growing difficulties that the Russian economy will present to the efficient co-development of the aircraft. This means that Russian suppliers should stay, but in capital heavy supply chain sectors the suppliers from Russia should be reduced.
Russian resources are about to become very limited soon so we might need to start preparing for it. We cannot afford serious delays on this program if Russia suddenly decides to allocate its resources elsewhere. We have to be proactive and I am sure our Russian friends will understand. As a compensation we can involve them more in subsystems development where there is limited risk.
At the moment, I wouldn't trust that an entirely Russian built aircraft system would come in time due to the sanctions and economic damage. Subsystems yes, but system no