Whether the Qieyun Division IV finals have a medial -i- or not is an issue that has been debated for almost a century since Karlgren published his monumental work entitled Etudes sur la phonologie chinoise. This paper examines the problem from the following four angles: 1. Evolution of the Division IV characters with a rounded medial; 2. Pronunciations of the Division IV chongniu 重紐 characters in Sino-Vietnamese; 3. Transliterations of Division IV characters in Buddhist canons translated from Sanskrit; 4. Tendency of the rhyming behaviors of Division IV characters in the Wei-Jin and Nan-Bei-Chao periods. Results indicate that the Qieyun Division IV finals do have a medial -i-.
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