From the perspective of social semiotics, the mutual influence between language symbol system and social system is insepara-ble.In the present research, through a review of the variation of language and writing system used by the Hui Muslims and the corresponding change of social system, the effect on the selection and development of language, and the use of language to construct social reality-mainly the construction of social identity-is analyzed.Development of the language system and the development of the social system is a two-way process and they promote each other.Language develops its function and structure according to the social needs.And meanwhile it also re-flects the social needs.%回族语言变迁的历程表明,社会系统对回族的语言选择及发展具有重要影响,表现在回族的移民分布状况、日常交流需求、政治干预和意识形态等方面。回族语言的选择对于其社会身份具有建构作用,它主要通过语言趋同、语言趋异和语言保持等策略建构其身份。
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