The Ukrainians have stated that they will not negotiate with Russia until the Russians pull out all of their troops from Ukraine, which is essentially the same as demanding unconditional surrender. At the same time, the Russians have stated that they are annexing the Kherson region and will not stop fighting until there is a reliably neutral Ukraine, which is a goal impossible to achieve without removing the Zelensky government, so the Russians are also effectively demanding unconditional surrender.

I think ultimately the outcome of the war may depend on the actions of China.