'Kāi piān' literally combines 'kāi' (to open) and 'piān' (a piece or section of writing), meaning the opening section of a written work—such as a book, article, speech, or essay. It functions as a formal, literary term that signals the beginning of a structured narrative or argument, often setting the tone, introducing key themes, or presenting an overview.

This word is commonly used in academic, journalistic, and literary contexts—not in casual conversation. You’ll find it in titles (e.g., '开篇语' — opening remarks), editorial notes, or when referring to how a text begins. Unlike more colloquial terms like '开头' (tóu kāi), '开篇' carries a refined, deliberate connotation: it implies intentionality and compositional design, not just chronological firstness. It’s rarely used for spoken introductions unless they’re highly scripted or ceremonial.