"Yi Qiao Bu Tong" literally means "not a single aperture is open." The ancients believed that humans have seven apertures (eyes, ears, nose, and mouth), and when all apertures are unobstructed, the mind is clear and intelligent. If not a single aperture is open, it is a metaphor for a person being muddleheaded and ignorant, with no understanding of things whatsoever. This idiom comes from the "Lüshi Chunqiu: Guo Li," originally referring to King Zhou of Shang being cruel and incompetent. Zigong, a disciple of Confucius, evaluated him as "not a single aperture is open." Later, it came to generally mean a complete lack of understanding of a certain area of knowledge or skill. It is used in a wide range of scenarios, and can describe a person lacking common sense, being ignorant of the ways of the world, or having no concept at all of a professional field. Its emotional tone is generally derogatory, but it is sometimes also used for self-deprecation. In terms of cultural background, it reflects the association between "apertures" and the mind in traditional Chinese medicine and ancient philosophy. In modern Chinese, it is often used to criticize or tease others for being dull, with a direct tone.
📝 Example
1. He knows nothing about computer programming and cannot even understand basic code.
2. Although I studied the liberal arts, I know nothing about classical music and cannot even tell Beethoven from Mozart.