Canadian Foreign Minister Chrystia Freeland arrives for a new round of trade talks at Office of the U.S. Trade Representative in Washington D.C., the United States, on Sept. 5, 2018. Negotiators from the United States and Canada on Wednesday resumed trade talks here to bridge their differences on the North American Free Trade Agreement (NAFTA) after the two sides failed to reach a deal last week. (Xinhua/Yang Chenglin)