te of Confucius Culture, Qufu Normal University, Qufu, Shandong 273100, China) Abstract:This paper explores the concept of “integrity” as it is manifested in the hexagrams and lines of the Yijing (the Book of Changes). Integrity has long been regarded as a universal concept and a core value in traditional Chinese thought. The Yijing offers profound interpretations of these symbolic representations, which convey rich ideas about the fundamental spirit and value of integrity. The study focuses on the relevant concepts of Fu 孚, Gong 躬, Zhen 贞, and Yun 允, examining recently unearthed literature and re-interpreting the associated hexagrams and lines. The paper challenges previous scholars’ understandings and provides new insights into the original meanings of these key terms. Fu, often equated with Xin 信 (trustworthiness), can be broadly interpreted as integrity. When it signifies “in accordance with” or “corresponding,” it indicates the alignment between the calendar and celestial phenomena. In the sense of “being convinced,” it refers to sincere and wholehearted persuasion. As “benevolence,” it involves convincing others through kindness. Gong can also be interpreted as integrity, sharing phonetic and structural similarities with Xin, shedding new light on the relevant hexagram and line texts. Zhen should be translated as “upright, steady, and calm,” akin to Zhen gu 贞固, emphasizing the immutability and stability that are essential for the literati (Shi 士) to uphold the virtue of integrity. Yun originally meant “indeed” and “truly,” but its meaning shifted to integrity during the Shang (circa 1600 BC-1046 BC) and Zhou (1046 BC-256 BC) dynasties. The nuanced interpretations of these four terms not only illuminate the philosophical underpinnings of the Yijing but also resonate with Confucian thought. Confucius’ emphasis on Xin (integrity) likely draws heavily from the Yijing.