The play between the West and China is not so direct it is more played indirectly. So US/EU will not ask/impose China something nor China will support Rusia against US/EU directly. Everything will happen indirectly and none of these two sides will risk the chance of a direct question where the answear could be NO thus making them act directly => collapsing global economy.

So if China wants to support Occident they will do it indirect and the same will go for US/EU: they will not ask China directly to ban Russia but more suggest that China should not be very active to support Russia.