The only statistics where Russia actually matters in the world today is the number of nuclear warheads.
Exactly. So many people don't understand this -- Russia has nothing to threaten US with when it comes to conventional warfare. Neither does China. They don't have the ability to wage war on the US, while the US with its carriers has a thousand times better power projection capabilities than any country in the world - combined. Not to mention its ubiquitous military bases spread around the globe and powerful allies in every region.
China and Russia have very little, thus, to gain from allying against the West in a military fashion. First, they have nukes and until someone comes up with a fool proof way of blocking them, there's no real threat, so there's no need for an alliance. Second, modern warfare isn't about numbers and that's all these two countries would gain from such an union. Western training is also leaps and bounds above anything east of Europe, though Russia has been a sponge as of late after it realized how outdated its training regimes were, so they're improving slowly. Morale is still a big problem, as is the issue of funds. The number of conscripts is impressive, but relatively very few of them get any real trigger time.