Unless they really say so this seems like a question that's hard to answer. However, as a guess/opinion, look to recent events:
Ukraine war: Zelensky wants Xi Jinping meeting following China's peace plan. Remember, the West pooh poohed said peace plan.
The peace plan is rather bland and unspecific. The West sees it as not condemning Russia but really, what it's in it can sway China either way:
Respecting the sovereignty of all countries. Universally recognized international law, including the purposes and principles of the United Nations Charter, must be strictly observed. The sovereignty, independence and territorial integrity of all countries must be effectively upheld.
Ceasing hostilities. Conflict and war benefit no one.
The safety of civilians must be effectively protected, and humanitarian corridors should be set up for the evacuation of civilians
China opposes unilateral sanctions unauthorized by the UN Security Council. Relevant countries should stop abusing unilateral sanctions and "long-arm jurisdiction" against other countries,
China has its own motivations, as other answers have said. But above all, China has always demanded respect.
If Zelensky puts on a good show of appealing to Chinese benevolence and stresses concerns that are part of the Chinese official line, China probably won't turn against Russia and will remain on the sideline. Public opinion may warm towards Ukraine - Russia's actions are after all fairly hard to really justify, Ukraine easily gets the sympathy benefit with many. If they put egg on China's face, there is a possibility that either Xi himself, or due to not wanting to appear weak to his nationalists ("strong China" is the CCP's selling point) they will start to support Russia more. As the US has claimed they might.
Getting on China's good side may yield UA some benefits (they have a UN veto as well though there are 4 more anyway), though it probably won't until China has realpolitik reasons to ditch RU. Being seen to publicly disrespect it could go really badly for UA.
Trying to win China aboard, as Ukraine is doing with the peace plan and not casting an anti-China vote on the Uyghurs is really quite clever. It would be stupid of the West to risk the overall trend in the UA-RU war by insisting that UA condemn China thus pushing it to support Russia: Chinese weapon deliveries would move the needle a lot more than Belarus and NK junk. I don't know if anyone is tracking what the Western promoters of the pro-Uyghur/anti-CCP vote are saying about abstainers (if they are saying anything). But I wouldn't be surprised they'd keep a low profile on criticizing Ukraine.
Since the war started China has a no-limit friendship with Russia that has limited itself to buying Russian oil. The West wants to keep it that way.
This is a game where everyone knows that the other knows that they know.