Pertinent literature abounds on how East Asian states have struggled to position themselves vis-à-vis a rising China over the past two decades. Due to its geographical proximity and cultural similarities with China, as well as its strategic importance to both the United States and China, South Korea’s tightrope-walking has been more pronounced than anyone else’s.1 Given the crucial strategic issues regarding U.S.-China relations and the North Korean conundrum, how the Seoul-Beijing relationship is to evolve undoubtedly constitutes a key variable in regional security dynamics. This chapter asks what is Seoul’s recipe for dealing with a China that is becoming more “assertive,” examining its changing strategic and diplomatic stance over the years of the Park Geun-hye administration and the first year of the Moon Jae-in government.

Of the six sections, the first offers a brief overview of the complex relationship since diplomatic normalization in 1992. The second outlines key features of an era of overoptimism during the first three years of the Park administration (2013-15). The third delves into the issue of THAAD (terminal high-altitude area defense) deployment and how that utterly shattered the Park-Xi honeymoon in 2016. The fourth offers a discussion on China’s narrowly-focused sanctions during 2016-17. The fifth is devoted to the first year of the Moon administration, focusing on envoy politics, the “three-noes controversy,” and Moon’s state visit to China. The final section provides concluding assessments of the factors critical in shaping Moon’s policy toward China and where the room for mending relations remains.