先秦時期，尤其是周朝到秦統一天下以前的春秋戰國時期，不管在政治、社會或文化方面都產生豐富多元的變化。因應時代的轉變，讓「忠」觀念也有許多豐富義涵，尤其「忠孝」、「忠恕」的觀念。 "Loyalty" is the virtue inherited by the Chinese nation. This is an important criterion for everyone to survive in the world. Pre-Qin philosophers have a lot of different meanings in their understanding of "loyalty", which has profound implications for individuals, society and the country. This essay expresses the meaning of "loyalty and righteousness" by analyzing the meaning and the arguments of pre-Qin books and philosophers. It can play a role in correcting human thought, improving the efficiency of social ethics, improving personal life and promoting the ethnic and social harmony in many modern society.
During the Spring and Autumn Period and the Warring States Period, especially before the Qin Dynasty, various changes took place in the political, social and cultural fields. In view of the changing times, there are many rich meanings to the concept of "loyalty", especially the concepts of "loyalty and filial piety" and "loyalty and forgiveness."