The American and Chinese leaders invoked years of personal contact as they met before the G20, seeking to pull back from outright conflict on a host of issues.
The trip is aimed at keeping the lines of communication open and having frank exchanges about important issues at senior levels in order to avoid conflict.
The Indonesia president, who has kept his focus close to home, is seeking a bigger role on the global stage, albeit with a domestic agenda. His next big test: the G20 summit.