Technologically the US is still much more advanced and precise then compared to the Chinese. They may have a very large military no doubt but comparativly speaking still inferior to the US. That being said they are still a considerable threat. I am an engineer and work for the Gov. so I know what I am talking about when it comes down to technological hardware. The only real advantage they have is their numbers. How ever we have the MOAB (Which is like an Atomic bomb but kills by using pressure waves from the explosion and not by extreme heat, also no radioactive fallow out and a smaller blast radius) and other weapons that were designed specifically to eliminate an enemies numerical advantage, as well as weapons to disable and disorient and confuse enemies which the Chinese do not.
Also economically China is also feeling the pinch just like us economically.
Russia is still an economic mess, with a powerful yet dysfunctional military that are not very well disciplined.