China has historically played an important role in influencing the Korean peninsula through military intervention and facilitating unification. As a neighbor and giant neighbor, China established a tributary system that allowed it to project power and influence over Korea. In ancient times, China directly controlled Korea at times and helped unify the peninsula under Silla. More recently during the Cold War, China supported North Korea against U.S. interests but has since taken a more neutral stance. Looking ahead, China's role in potential Korean unification could range from non-intervention to actively intervening, but it will likely focus on providing collective stability and security to the region during any transition process.