China is a far bigger worry militarily than Russia.
they have the same state control mechanisms, but with probably less corruption.
their economy provides the world with goods, and has done for years. This has earnt them fortunes which they’ve re-invested, particularly in Africa and Asia.
their military has also been remarkable at copying other countries high technology, in the past few years this has been moved onto producing their own state of the art weapons. The quantity of naval shipbuilding in the past decade is incredible (look at wiki and the dates of when ships built).
… and of course they are nuclear.
they currently don’t have the same ability as the US to project force worldwide, but in Asia they are flexing, and with the speed their navy is growing - their carrier ability has gone from zero to 2nd largest in world in a decade - it won’t be long before they have some equivalences to the US fleets.