2. Righteousness originates from Zhu Cheng's Neo-Confucianism. Neo-Confucianism is the theoretical expression of social, economic and political development after the Northern Song Dynasty. The peasant uprising in the late Tang Dynasty destroyed the political and economic power of the powerful landlords. After a short period of war in the Five Dynasties and Ten Kingdoms, the Northern Song Dynasty re-established a unified centralized feudal country, the feudal relations of production were adjusted to a certain extent, and the social economy was developed. Science and technology have also made great achievements. Under this new condition, the feudal ruling class needed an ideological weapon to maintain unity, and Neo-Confucianism came into being. Neo-Confucianism is the result of the long-term development of China's ancient philosophy, especially the direct product of criticizing Buddhism and Taoism.