Served as graduate teacher and panel chairman in secondary school, lecturer at Institute of Language in Education and City University of Hong Kong. Course taught: Subject and Curriculum Teaching.

Hong Kong Cantonese, Sociolinguistics, Language Testing, Putonghua Teaching and Teaching Chinese as a Second Language.

1. Teaching Designs in Putonghua in Secondary Schools. (1993). Hong Kong : Institute of Language in Education, Education Department.

2. A Study on Tone Sandhi in Hong Kong Cantonese . (1994). M.A. Thesis . Hong Kong Baptist University. A collection of Thesis from The Fourth International Conference on Chinese Language Teaching. Taipei. (1994).

3. A Study on Variation of ng-f in Hong Kong Cantonese. (1995). M.A. Thesis. Jinan University . A collection of Thesis from the Fifth International Conference on Cantonese & Other Yue Dialects. Guangzhou: Jinan University Press.

4. Putonghua Teaching from Theory to Practice. (1997). Hong Kong: Wide Angle Press Ltd.

5. Phonetics File of Hong Kong Cantonese. (1999). Shanghai: Shanghai Educational Press.