An influential work on Cantonese, "A Chinese Syllabary Pronounced According to the Dialect of Canton," written by Wong Shik Ling, was published in 1941. He derived an IPA-based transcription system, the S. L. Wong system, used by many Chinese dictionaries later published in Hong Kong. Although Wong also derived a romanization scheme, also known as the S. L. Wong system, it is not widely used as his transcription scheme. This system was preceded by the Barnett–Chao system used by the Hong Government Language School.