His published works often focus on Sinitic languages, including Cantonese and bilingualism in Hong Kong.
The project, which includes transcripts and searchable video and audio segments, took 10 years to compile.
This database is the basis of a book, The Bilingual Child, written by Yip and Matthews and published by Cambridge University Press in 2007, which received the Leonard Bloomfield Book Award from the Linguistic Society of America in 2009.
The database focuses on children who are bilingual in English and Cantonese and who learned to speak two languages through the one-parent, one-language approach.
[4] An amateur musician, he has played second violin with the Hong Kong Chamber Orchestra and the SAR Philharmonic.