ABSTRACT: Based on a database of rhymings in Book of Songs , this paper proves that in old Chinese: (1) Dental-ending finals (with coda -t/-n/-d/-r) could have rounded medial -u- or -w-; (2) Finals in labial syllables (with labial initial) could be classified into two tyes: rounded and unrounded; (3) Velar-ending finals (with coda -k/-ŋ/-g) had no rounded medial, but could follow a labialized initial kw- or pw-; and the labialized w- gave rise to rounded medial -w- in middle Chinese; (4) In Book of Songs , there was a tendency to distinguish rounded rhymes from the unrounded. 摘要: 基于《诗》韵数据库，文章证明上古音如下问题：(1)收舌韵(-t/-n/-d/-r) 可存在合口介音-u-或-w-；(2)唇音字有开口与合口之分；(3)收喉 韵(-k/-ŋ/-g)没有合口介音，其在中古为合口的，合口成分是由上古 唇化声母(kw-/pw-)演变出的；(4)《诗经》押韵有追求开合分押的趋 势。
Hu et al. (Fri,) studied this question.