South Korea's Economic Leverage Against China Amid Nuclear Submarine Deal

They're shaking hands, but they haven't let go of their fists. In January 2026, South Korean President Lee Jae-myung met with Chinese leader Xi Jinping in Beijing to mend ties. Despite signing over a dozen agreements on trade and climate, the underlying geopolitical tension remains at a boiling point. The recent breakthrough in defense cooperation with Washington is setting the stage for a major showdown with Beijing.

The Impact of the ROK-US Nuclear Submarine Deal

The core of the friction is the unprecedented nuclear-powered submarine deal reached between President Lee and Donald Trump in late 2025. While Seoul frames this as a necessity to counter North Korean threats, Beijing views it as a direct challenge to its maritime dominance. During the recent summit, Xi issued a cryptic warning, telling Lee to make the 'correct strategic choice'—a clear hint that economic retaliation might be on the horizon.

Building Collective Leverage Against Chinese Coercion

South Korea isn't as vulnerable as it once was. With bilateral trade exceeding $300 billion in 2025, Seoul holds significant economic leverage. By working with Japan and the United States, Seoul can amass enough collective resilience to fend off Beijing's bullying. The focus is shifting from simple bilateral trade to securing critical supply chains in semiconductors and batteries where South Korea remains a dominant player.