Then China will simply deal with individual European nations; if China ever felt the need to speak to the US that’s what the Secretary of State is for, it doesn’t need to go to whatever the hell this rich western elites LARPing as Charlemagne BS this is.
If there is only this one condition, then there is actually a way to achieve four wins for Russia, Ukraine, China, and the EU.
China persuades Russia and Ukraine to cease the war, Russia withdraws from Ukraine, and then Ukraine and Russia carve up Poland. Finally, the EU and China develop normal relations.
Ah, the only small blemish is that Europe needs to ignore a world where only Poland is injured.