What is the main manifestation of harmony between people in Confucianism?

Benevolence: kindness. The theoretical core of Confucius' ideological system. It is the highest ideal and standard of Confucius' social politics, ethics and morality, and also reflects his philosophical views, which has a far-reaching impact on later generations. "'Benevolence treats people in an orderly and harmonious way' is the origin of Confucius' thought and the core of Confucianism." (Chen Zhisui's Tang Jingji) Benevolence is embodied in the educational thought and practice of "teaching without distinction". In the Spring and Autumn Period, learning was in official schools, and Confucius first opened private schools. Disciples can come to be taught regardless of their origins. Benevolence embodied in politics is to emphasize "rule by virtue", and the basic spirit of rule by virtue is to love the people and help others. Confucius introduced benevolence into the ceremony and changed the traditional "rule by virtue" into "rule by virtue". He did not deny "rule by virtue", and his "rule by virtue" is undoubtedly the inheritance and transformation of "rule by virtue". Love is the essence and basic content of benevolence, and this kind of love is pushing yourself and others, from kissing to being popular.