The recently held Korea-Japan-China Trilateral Summit in Seoul is the focus of this series of articles. As the first three-way meeting in nearly five years, the leaders of the three East Asian countries reaffirmed their shared interests while acknowledging disagreements on some crucial issues, such as the denuclearization of North Korea. The question arises: "Can South Korea, Japan, and China make progress on their common prosperity agenda while navigating complex security challenges amidst intensifying global and regional rivalries?"