After nearly one millennium since its birth, Chinese poetry achieved an optimal convergence of sound and sense in its pentasyllabic poems developed during the Eastern Han (25-220 CE). Taking full advantage of an explosive rise of two-character compounds, the anonymous Han pentasyllabic poets created a poetic rhythm far more flexible and expressive than all existing rhythms and adapted it for philosophical reflection and emotional brooding on human transience.
Cai, Z. (2022, Jun 7). Han Ancient-style Poetry: The "Nineteen Old Poems": The magic of one additional character and the rise of reflective poetry . In How to read Chinese poetry podcast. Hong Kong: Lingnan University. Retrieved from https://commons.ln.edu.hk/poetry_podcast/19/