“求中”、“得中”在古文獻中較早見於《周易》的象傳、彖傳,随着儒家思想漸居主導地位,更多見於對四書五經等古代經典的注疏、說解中,主要内涵是對中道思想的宣揚。但是,虞舜的故事與中道思想的形成至少相隔夏商西周三代千餘年的時光,將故事裏的“中”與“中道”這深奥的哲學思想聯繫,不免使人疑惑,於是一些研究者另闢蹊徑作出許多推想,衆說紛紜,以至成爲清華簡《保訓》中“最難理解”的一個字了。 In the ancient literature earlier seen in the “Book of Changes” of the image, biography, with Confucianism gradually dominating, more common in the four classics and other ancient classics Note Shu, explain the solution, the main connotation is to promote the middle thought. However, Yu Shun’s story and the formation of middle school thought at least separated from Xia Shang-Shang for more than a thousand years on Wednesday, which made people confused the profound philosophical thoughts of “Zhong” and “Zhongdao” in the story. Therefore, some researchers have made many attempts to find new ways of thinking, divergent opinions, and even become the word “most difficult to understand” in Tsinghua Briefing.