王筠在《说文释例》中探讨了许慎《说文解字》的重文体例，形成了三篇文章——《同部重文篇》、《异部重文篇》、《分别文、累增字篇》，这三篇相辅相成，构成了王筠对重文的理解，因为三篇以《异部重文篇》为王筠的研究重心和突出成果，所以把这三篇统称为“异部重文”三篇。

本文主要分为两个部分。其一是通过阅读王筠在《说文释例》中对于这三个概念的阐释，结合具体的文字材料，阐释王筠“异部重文”观的主要内容——许慎将无它部可入、偏旁相同、声意不合的重文类聚起来，为同部重文；异部重文为许慎排列重文的常例；异部重文中有体现文字前后动态承续关系的分别文和累增字。其二是对后来学者关于王筠的“异部重文”说的综述和评议。主要分为三个部分，一是后来学者关于重文，包括同部重文、异部重文概念的界定主要采用与相关概念对应的方法；二是关于异部重文是否是许慎本意的重文体例的问题，学者们对此持反对意见；三是王筠提出的分别文、累增字问题的现代文字学的延伸。

王筠对《说文》重文体例的研究给现代文字学很大的启发，包括对于概念的科学界定和使用问题、对于文字孳乳分化问题的深入研究，是文字学研究中的宝藏。

Wang Yun explores the Chongwen style of Xu Shen's "Shuowen Jiezi" and forms three articles - "Chongwen in the same unit chapter", "Chongwen in different units chapter", and "Fen Bie Wen and Lei Zeng Zi chapter", which complement each other and constitute Wang Yun's understanding of Chongwen. The three articles are collectively referred to as the "three articles of Chongwen in different units chapter" because they are the focus of Wang Yun's research and outstanding results.

This paper is divided into two parts. The first is to read Wang Yun's explanation of these three concepts in "Shuowen Shili", and to draw the theoretical significance and main content of Wang Yun's concept of "Chongwen in different units" by combining specific textual materials - Xu Shen grouped the Chongwen that had no other parts to enter, had the same paraphernalia, and had different sound and meaning. Chongwen in the unit; Chongwen in different units for Xu Shen's arrangement of Chongwen of the regular case; Chongwen in different units of the text before and after the dynamic relationship between the text of the separate text and cumulative characters. The second is the view and development of later scholars on the research results of Wang Yun's Chongwen style. The second is the question of whether or not the different part of Chongwen is Chongwen style that Xu Shen intended, which scholars oppose; the third is the results of the textual breeding and change developed by Fen Bie Wen and Lei Zeng Zi.

Wang Yun's study of Chongwen style of Shuowen has inspired modern philology, including the scientific definition and use of concepts, and the in-depth study of the differentiation of textual yields, which is a treasure in philological research.