【明報文章】Great power competition between the US and China is a fashionable topic. Comparisons abound with the Cold War era or the nineteenth century, when multiple actors in Europe competed with each other in Europe and more globally. What is less discussed though is the emergence of a group of countries often referred to as "middle powers". While attention is paid to what Washington or Beijing are doing to prevail in their competition, the middle powers could hold the key in the widening China-US rivalry.