China and the US – Iran’s key partner and its chief adversary – found firmer common ground on Tehran at the Washington summit last month, and further head-of-state diplomacy could work in Iran’s favour, according to analysts. Iran was on the agenda when the presidents of the United States and China met in Beijing in May and again in Washington in September. There was no direct reference to Tehran in Beijing’s statement after the May summit, but following the September meeting China was more...