Based on the special mixing phenomenon of Li Mengyang's rhymes,combining with the works of Longdong dialect in the Qing Dynasty,and comparing with the current Qinlong dialect of the Central Plains mandarin,the special rhymes are analyzed,which reflect the vowel characteristics of Qingy-ang Dialect in the Ming Dynasty:the disappearance of[-m]as the nasal tail vowel and ru-sheng rhyme,the same tail vowel of[-n]and[-ŋ],the tongue position of the main vowel of"Tongshe"moving forward,the same vowel of"Jiangshe"、the"Dangshe"in front-open vowels and"Tongshe",the same vowel of"Gengshe"in front-open vowels and"Dangshe",the same vowel of"Guoshe"and"Jiashe",the same vow-el of the"Hekou"words of"Zhishe"and"Yushe",the same vowel of the"Duan"and"Zhuang"groups of"Yus he"and"Liushe",the same vowel of the"Liushe"in front-open vowels and"Xiaoshe",as well as the same vowel of the labial words of grade-1"Xiaoshe"and"Yushe".
Li Mengyangancient poetryfu(descriptive prose interspersed with verse)the charac-teristics of vowelsQing Yang vowels in the Ming Dynasty