美国国防部长马蒂斯访问北京

U.S. Defense Secretary Jim Mattis, second from left, speaks during a meeting with China's Defense Minister Wei Fenghe at the Bayi Building in Beijing, Wednesday, June 27, 2018. (AP Photo/Mark Schiefelbein, Pool)

国防部长马蒂斯访问北京, 2018 年6月27日