There are different opinions about when Confucianism was introduced into the Korean peninsula. Generally, Korean scholars believe that the cultural relics laws, regulations and academic thoughts of Wei Man Korea (BC 190- 108) and Han Dynasty were transplanted and imported into the Korean Peninsula, and many people could understand China's classics. Some scholars have pointed out that according to China's history book Wei Lue, at the end of the Warring States Period, in the twenty-ninth year (283 BC), the Duke of Korea had an association with Yan. "According to the spread of Chinese characters at that time, it can be inferred that Confucianism contained in Chinese characters was also introduced and learned." This shows that the Confucian tradition in Korea has a long history. With regard to the discussion on the historical period of the introduction of Confucianism into South Korea, China scholars believe that the process of the spread of Confucius in South Korea can be roughly divided into four periods: first, the introduction period, which is about the third century to 675 AD, that is, Confucianism was introduced into South Korea, and South Korea was unified by Silla in the Three Kingdoms period. Second, the development period, from 675 to 1392, that is, from the period of the unification of Silla, through the king's Korea to the establishment of Lee's Korea. Third, in its heyday, from the establishment of the Li Dynasty in 1392 to Japan's annexation of Korea in 19 10. Fourth, the fading period, from 19 10 to the present. It is in this long process of 2000 that Confucius thought gradually spread and took root in North Korea and became a traditional thought. Any statement should be based on history. It can be seen that there are different opinions about the introduction of Confucianism into North Korea.

In South Korea, social morality is still the "eight virtues" put forward by China in Song Dynasty: "filial piety, faithfulness, courtesy and shame". In the Yuan Dynasty, China's "Zhu" was introduced to North Korea, which is still the normative basis of North Korea's family ethics.