There was certainly a vast alliance to remove Trump, one way or another. Chinese troops based in Canada may have been one component.
From what I see, Biden was selected to be the Democratic nominee because of the corrupt dealings with China and Ukraine, not in spite of them. Biden’s proxy war with Russia has helped China tremendously.
Neocon war rhetoric about China is just a distraction. The real battle to save democracy and freedom is already within the US, not on some distant shore.