When classical Chinese poetry flowered during the Tang dynasty, the "Qieyun" became the authoritative source for literary pronunciations and it repeatedly underwent revisions and enlargements. It was annotated in 677 by Zhǎngsūn Nèyán (長孫訥言), revised and published in 706 by Wáng Renxu (王仁煦) as the "Kanmiu Buque Qieyun" (刊謬補缺切韻; "Corrected and supplemented "Qieyun""), collated and republished in 751 by Sun Mian (孫愐) as the "Tángyùn" (唐韻; "Tang rimes"), and eventually incorporated into the still-extant "Guangyun" and "Jiyun" rime dictionaries from the Song dynasty. Although most of these Tang dictionary redactions were believed lost, some fragments were discovered among the Dunhuang manuscripts and manuscripts discovered at Turpan.