Zhào Shìhū 趙士㣓 (1095–1160), Sòng imperial-clansman (descendant of Tàizōng 太宗 line). Held Zuǒ Cháoqǐngdàifū zhī Wúwéijūn 左朝請大夫知無為軍 in Shàoxīng (early 1140s), in which capacity he searched for and assembled the lost works of the Wúwéijūn-native poet Yáng Jié 楊傑 楊傑. His Shàoxīng 13 / 1143 (guǐhài) preface to the Wúwéi jí 無為集 KR4d0058 — preserved at the head of the Sìkù recension — is the principal source for the collection’s editorial history: he records that “after a year and more searching, the gathered pieces were not few”; that he excluded fúshì jiā (Buddhist and Daoist) shīwén, intending these to circulate in a separate biéjí (now lost); and structured the surviving fù, shī, bēijì, záwén, biǎoqǐ into 15 juǎn. His birth-death dates (1095–1160) are taken from CBDB.