Smart Q&A: Chaesung Chun, Dong Ryul Lee, Young-jun Park The Changing Security Environment in East Asia and South Korea’s Diplomatic Strategy “Korea's Diplomacy Should Concentrate on Signaling its Future Vision” Chaesung Chun (EAI; Seoul National Univ.), Dong Ryul Lee (Dongduk Women's Univ.), and Young-jun Park (Korea National Defense Univ.) point out the coexistence of cooperation and competition among China, Japan, Russia, and the U.S. as a key feature of the current East Asian security environment. For South Korea, they argue that it is important to relay its vision and strategy to its key partners by emphasizing its role and status as a middle power in the region.