Zelensky said that China is trying to disrupt the peace summit with its absence:

Zelensky said that China is trying to disrupt the “peace summit” with its absence: “No one has the right to tell us how this war should end. It must end legally, in accordance with international law. In fairness. And this is a must. We invited both China and Brazil, and we invite all countries. And what’s more, we haven’t prepared our own agenda exclusively. We said: there are 3 crises, the first three. Let’s talk about them, because they should be close not only to Ukraine, but also to many countries in Asia and Africa.” Source: Russian Head