I don't expect much of value to be discussed, Ukraine topic will probably be completely avoided except for EU indirectly asking for industrial and energy aid. Which will probably be denied.
EU isn't smart enough to create a backroom deal. And they don't have enough leverage. The only major thing they can offer is to leave US bloc, but unless US itself collapses, they won't be able to, Washington's grip on them is like USSR's grip on the SSRs.
Beijing itself likely cares little about the chips war. For them it's just a way to let private companies improve in competitiveness, since the govt already has access to everything they need. If they're suddenly desperate they can just nationalize TSMC.
I think best case scenario, China can help Ukraine retain sea access and return of Kherson and Zaporozhiya oblasts, if EU promises that should US invade China, EU will refuse to aid America.
Otherwise, Russia will not stop until Ukraine is at least landlocked and honestly tactical Ukraine successes due to numerical advantage matters little. Because Russia has not even committed most of its forces, let alone conscripted troops, and according to the same doctrine China applied with the Korean war, China will never let Ukraine "win" (as in enter Crimea or even just the LDPR). There's several levels of escalation both Russia itself and China can take, example: Russia openly declaring war, China shipping weapons through Iran, China directly shipping weapons to Russia, Russia instituting draft, and so on. While NATO has escalated as far as possible besides directly attacking Russia.