The book discusses tonal prosody rules in poems of three most important Yongming syle poets Shen Yue, Wang Rong and Xie Tiao. Different from traditional observation with experience, the book uses quantitative research method to compare tonal prosody in Yongming style poems with that of post-Yongming poems and other kinds of tonal prosody. The book finds Yongming style poets control tonal prosody intentionally.