Zhū Shǐ 朱史 (fl. 560–566) is identified in the Kanripo title register as the compiler of a Lòukè jīng 漏刻經 (“Manual of the Clepsydra”) of one juàn, with dynastic placement under the Liáng 梁. The Suí shū lǜlì zhì 隋書·律曆志 (juàn 17, Lòukè 漏刻 section) — the principal historical witness — places him under the Chen 陳, not the Liáng, with the office Shèrén 舍人 (Secretary): during the Tiānjiā 天嘉 era (560–566) of Chen Wéndì 陳文帝, Zhū Shǐ was commissioned to construct the imperial clepsydra following the orthodox 100-kè 刻 day-and-night division, after the abandonment of Liáng Wǔdì’s experimental 96-kè (Tiānjiān 6 = 507) and 108-kè (Dàtóng 10 = 544) systems.
The Kanripo register’s Liáng dating accordingly is most likely a conflation with the better-known Liáng-period Lòu jīng 漏經 by Zǔ Gēng 祖暅 (祖沖之 Zǔ Chōngzhī’s son), composed under Liáng Wǔdì on the basis of húntiān 渾天 and the sun’s varying ecliptic distance from the celestial pole — the principal predecessor that Zhū Shǐ’s later Chen-period clepsydra restored after the Liáng 96-kè / 108-kè experiments. The Kanripo source-file itself bears the internal attribution Quèmíng 闕名 (“[author’s] name omitted”).
The Lòukè jīng text surviving as KR3f0064 contains anachronistic references to Tàipíng qián 太平錢 (the Tàipíng tōngbǎo 太平通寶 was first minted in TàipíngXīngguó 976–984, Sòng dynasty) and to clepsydra-construction details using cí yú 磁盂 (porcelain vessels) — both later than any genuinely 6th-century text — so the surviving Kanripo file is best understood as a much later (Sòng or post-Sòng) clepsydra manual conventionally attributed to Zhū Shǐ rather than as Zhū Shǐ’s own 6th-century work. The Chen-period official and his clepsydra-construction commission are nonetheless secured by the Suí shū lǜlì zhì witness, even if the surviving manual is not his.
He has no CBDB id (the current dump records only Sòng-period 朱氏 maternal references, none matching this Chen-period official).