A lack of mutual trust and confidence haunts Sino-US relations, a major security conference in Beijing has heard, just a week before Xi Jinping travels to America for his first state visit there in over a decade. “[While] we have the agreement on this constructive strategic stability, we don’t have the illusion that things will be easy going ahead. There are always problems, sometimes very big problems,” said Cui Tiankai, a former Chinese ambassador to Washington, at a panel of the Xiangshan...