China and South Korea have come a long way since they were adversaries. The arc of their relationship since the late 1970s is an excellent model of East-West cooperation and, at the same time, highlights the growing impact of China's 'rise' over its regional neighbors, including America's close allies. South Korea-China relations have rarely been studied as an independent theme. The accumulation of more than fifteen years of research, Between Ally and Partnerreconstructs a comprehensive portrait of Sino-Korean rapprochement and examines the strategic dilemma that the rise of China has posed for South Korea and its alliance with the United States. Jae Ho Chung makes use of declassified government archives, internal reports, and opinion surveys and conducts personal interviews with Korean, Chinese, and American officials. He tackles three questions: Why did South Korea and China reconcile before the end of the cold war? How did rapprochement lay the groundwork for diplomatic