China and the United States may have agreed to establish a “constructive” relationship characterised by “strategic stability” but deep-seated differences have left the future shape of the relationship looking uncertain, a forum in Beijing heard on Saturday. Looking ahead to President Xi Jinping’s possible US visit later this year, Sun Yun, director of the China programme at US think tank the Stimson Centre, said such trips typically required a list of deliverables, “but to my knowledge, both the