Read Edit View history 書函 shūhán letter Origin Definitions Defs Strokes Stroke Words Sentences Sents Senses Add sense 书函/ 書函 shūhán letter a letter or correspondence; mail Edit Delete 书函/ 書函 shūhán slipcase a protective case or sleeve for a book Edit Delete References Add reference classifier 书函/書函 → 封/封 Edit Delete