Looking back on Korea-China relations after diplomatic relations, Korea-China relations were established in August 1992 as the political and economic interests of Korea and China were consistent in the international situation of post-Cold War in the 1990s. After diplomatic relations between Korea and China, exchanges in various fields such as politics, economy, society, and culture expanded, and human and material exchanges increased rapidly. Diplomatic relations between Korea and China contributed greatly to the peace and stability of the Korean Peninsula, and through a huge market attack called China, it served as a decisive opportunity for Korea to achieve the second economic leap forward. However, when the Korean government announced the deployment of THAAD on the Korean Peninsula in 2016, the golden period between Korea and China, which has lasted for about 23 years since 1992, has come to an end. Currently, Korea and China are in a serious situation of antagonism and conflict between the government and the people. Korea and China are important neighbors and partners to each other, and developing bilateral relations well helps greatly protect the national interests of both countries and peace and stability in Northeast Asia. Currently, Korea-China relations are in a tight state, but efforts to improve relations through understanding and communication are continuing. This study will examine the transition process of Korea-China relations and explore China's perception of the Korean Peninsula in the Xi Jinping era. Through this, we analyze the problems currently facing Korea and China and suggest a constructive plan to develop bilateral relations between Korea and China.