JAKARTA: US Vice President Kamala Harris, Chinese premier Li Qiang and Russian foreign minister Sergei Lavrov will attend an East Asia summit in Indonesia on Thursday, offering an opportunity for direct, high-level diplomacy between the rivals.The 18-nation meeting will bring Washington and Beijing into contact a day after Premier Li Qiang warned major powers must manage their differences to avoid a "new Cold War", ahead of the G20 summit in New Delhi this week where Chinese President Xi Jinping will be absent.Interactions between the officials from the world's...