China is an untested superpower without real-world wartime experience with modern weapons, modern warfare, and modern intelligence.
Russia is the only real threat to the United States.
Russia never wanted to be that. The US rejected their desire to join NATO, sabotaged Putin's relationships with Chirac and Shroeder. In fact it was probably the joint veto of the US iraq war (Russia + France + Germany) in the UN security council that made the US dead-set on isolating Russia from Western Europe. People always mention NATO expansion, but there was a lot of other moves the West pulled, such as withdrawing from the ABM treaty, putting Aegis defense systems in Poland and Romania (to defend against Iran? bullshit), etc, of course most recently the bombing of the Nord Stream pipeline. The US sabotaged Russia's desire to be friends with Europe countless times and forced Russia into the only move it had left - to build itself up militarily, in as much isolation as America could create for it. But it wasn't supposed to succeed god damnit! The Americans fucking *HATE* that Russia actually economically grew so much and militarily developed so god damn much over such short time. And they *hate* that their sactions didn't work, that they can't just make the world dance at their whim anymore. The Americans reliably play their hand like absolute dicks, and I'm glad their gambits fail. Fuck the Americans (I'm talking about those in power, not you guys. I love you guys).