Leaders may reach an understanding, but that does not mean the people can forgive. Never forget, China is a People's Republic.
People never forget,never ever.
It seems like you want to create enemies when there are none. Russia is as of now a solid ally of China and has been for a number of years. Same goes the other way.
When you include DPRK in the mix, and Pakistan on the "other side" of the map, there are 4 nuclear-armed countries that have a very close relationship, especially towards PRC.
Only Russia and Pakistan have still a "weaker" economic and military link between them, but it's growing step-by-step.
However, Iran has now also emerged into this mix, getting closer now to both Russia and China (PRC).
India is unfortunately a problem, but if the Congress is able to overthrow the Hindutva-extremist Modi in 3 years from now, there is a potential to even more regional integration.
Then, there is Bangladesh and Vietnam with growing ties with these countries now as well, along with Thailand, etc.
China is never going to be that powerful and be able to take on U.S. Imperial network that also includes Japan, and then having to worry about Hindutva-BJP-extremists on the other side + adding now Russians - according to you - as an enemy, just for fun.
China needs friends and allies and China also needs very strong defense, if China is planning to "break-out" of the containment strategy that U.S. is putting against it in Western Pacific.
There is no dispute between Russia and PRC as of today, and border dispute has been settled long time ago.
So there are extremely few individuals that share this sentiment with you regarding targeting Russia as some kind of enemy. Just random online idiots.
China is even way too nice against Modi-regime despite the fact that there is a considerable number of Maoist rebels in India that could easely have been fully armed by PRC to create Superior Maoist Reich of the 21sts Century in India - and then China could have armed around 200.000.000 Muslims that live in India as well to create Supreme Islamic People's Republic of India.
Then China could have armed all Dalits, to create Dalit's People's Republic. Etc. So much crap China could have done, and China is not doing it.
It would be extremely irresponsible in every way to make an enemy of Russians for absolutely nothing, when the whole West wants Russia dead and cut up in several pieces, the same way they were able to do with USSR.
Russia is an ally, and there is no reason to think otherwise.