Former U.S. Secretaries of State Henry Kissinger speaks at an event called "Leaders Speak: Secretaries of State," in New York, the United States, on Dec. 5, 2016. Former U.S. Secretaries of State Henry Kissinger and Madeleine Albright stressed the importance of the U.S.-China relationship during the event on Monday, while expressing optimism for cooperation between the two countries as the U.S. moves to transition into the Trump administration. (Xinhua/Wang Ying)