Its never ceasing to amaze me that Ukraine, with essentially leftover western equipment, is handling a full blown invasion by Russia. Its pretty incredible to think what would happen to Russia if the west actually went all in and took down Russia with its full might.
I know they aren't as dependent as they've been in the past on Soviet/Russian armor but it does provide some hints to China's position as well. A western army at full strength with the full support of the western nations is, and will continue to be for a long time, an unmatched military force on the planet.