In the past we only knew that Sung-dynasty literature and what came before it were two different matters. It was only after the Tunhuang pien-wen came to light that we became clear about how the p'ing-hua style developed out of the antithetical p'ien-t'i style and poetical form.
過去我們只知道宋朝文學和以前是兩回事，但如何由駢體、詩體過渡到平話形式，在敦煌變文出現後，才清楚起來。