The Chinese word **图纸** (túzhǐ), meaning "blueprint" or "technical drawing," is a compound noun formed through semantic combination. It consists of two meaningful characters: **图** (tú), which means "diagram," "chart," or "drawing," and **纸** (zhǐ), which means "paper." The word follows a common modifier-head structure in Chinese, where the first character **图** specifies the type or purpose (the drawing), and the second character **纸** indicates the physical medium (the paper). Thus, the compound literally translates to "drawing paper," and through conventional usage, it has come to refer specifically to the technical plans or blueprints printed on such paper.