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Russia isn't really a threat to NATO anymore.
The one link I provided showed that, so long as the US remains in NATO. Also, so long as Putin continues his war, which is draining Russian military assets and resources.**
But countries like Poland still need to be wary, which is why they are sending so much aid to Ukraine.
China is a threat in the SCS region, but that is far away from Europe. You could argue they would need navies for that, and Britain does have one. The others, mostly for coastal defense (like Sweden's "navy"). The Chinese army is no threat to Europe.
**Assuming he doesn't go nuclear...then Russia is a threat to everyone, but it would be suicide (MAD).