https://www.voachinese.com/a/voaweishi-20181231-voaio-xi/4722805.html
國際危機組織:美中緊張關係位列明年最需關注的衝突https://www.voachinese.com/a/think-tank-us-china-tensions-most-concerned-conflicts-next-year-20181231/4723385.html