Tianjin Dialect is one of the most interesting dialects, inparticular, for its tone sandhi. It has attracted many phone ticiansand phonologists, among whom are found the authors of the MA theses collected here. The theses discuss Tianjin Dialect from the aspects of phonetics, phonology and sociolinguistics. All the authors are Professor Wang Jialing's students.Professor Wang is a well-known phonologist for his introducing generative phonology to China in the 1980's and his research on the neutral tone in Chinese. His research project The Phonetic Description and Non-linear Phonological Analysis of the Neutral Tone in Putonghua and Tianjin Dialect was supported by the National Social Science Fund. The project, according to the evaluation report, took the lead in China. He iscurrently doing another national project on the neutral tone in Chinese dialects within the framework of the optimality theory.