So many people seem to think that the participation of players like China, Malaysia, US, Indonesia etc is dominated by geopolitics, deception, and even commercial advantage. There is no doubt that security sensitivities will influence actions and will certainly influence public information sharing. There is no doubt that cooperative approaches are challenged by a whole range of sovereign and institutional barriers. But all of the people involved are people; people with families, friends, relatives and emotions and I would expect that most players just want to help people suffering.
Think about it. It's difficult enough to agree on what you are going to have for dinner each night. Instead of this somewhat paranoid and dysfunctional view, which is not entirely unwarranted, I happen to think we are seeing an effort of global cooperation that we should celebrate rather than pick holes in. Because the holes are going to be there despite best efforts.