Nicholas Burns, the U.S. ambassador to China, also said he was leaving his post with deep concerns about the future of relations with China.

President-elect Donald Trump declined to rule out using military or economic coercion as he detailed plans to seek greater US influence over Greenland, Canada, and the Panama Canal during a press conference Tuesday.

However, Bonnie Glaser, a Taiwan expert at the German Marshall Fund of the United States, said that for Chinese President Xi Jinping there were other factors carrying greater weig