russia is likely to want to include china as the only non-hostile great power with significant weight to throw around in any arrangement.
Again, the short sighted, xenophobic and close minded attitude of some chinese to taking part in security arrangements in the western world is really puzzling. Being part of such arrangement does not preclude china from simply pulling up stakes and leaving if the arrangement collapses, but it give china opportunity to exact a price for collaborating to get done, or at least not obstructing things that needs to be done under the arrangement while the arrangement stands. It’s called a proactive if opportunistic foreign policy.