Historical memories have always been obstacle that hinders the progress of the reconciliation within three countries of East Asia. In order to overcome this obstacle, we need to trace back to the time when the actual event occurred back in 1950s. In year 1950, the outbreak of the Korean War was accelerated the emergence of Cold War in Asia. Due to the rapid spreading of the cold war in Asia, it has resulted in the separation between North and South Korea and mainland China and Taiwan. To overcome this difficult situation, it is necessary and imperative to reflect on the causes that triggered the Korean War. This article has analyzed the points on China aiding North Korea and against American actions during the Korean War period and also the awareness and position of China toward the Korean peninsula and the separation of North and South Korea issues. After a series of in-depth research and study found that the contradiction in ideology between dominant countries - America and Soviet Union during the Korean War was the main factor that influenced the relationship between China and North Korea in terms of the idea of socialism. In the case of the configuration of Cold War, affected by the socialism ideology, China has taken an extreme diametrically strategy toward North and South Korean after the division. Furthermore, the propaganda and creation of dramatic works during the period in China were primarily focuses on farmers and laborers works. Hence in the distinction between North and South Korea, China has obviously shown a deeper relationship with North Korea.