Eastern Jìn 東晉 philosopher and commentator, active c. 370 CE. Zì Chǔ dù 處度. Author of the foundational commentary on the Lièzǐ (列禦寇’s scripture, KR5c0049) — which is itself an Eastern-Jìn forgery, probably composed in Zhāng Zhàn’s own family circle.
Lifedates. Fl. c. 370. No precise birth or death dates are recorded. Served as Jìn Guāng lù xūn 晉光祿勳 (“Jìn Chamberlain for Ceremonials”) — a mid-level court position at the Eastern Jìn court. Also attested as Zhōng shū shè rén 中書舍人.
Philosophical context. Zhāng Zhàn’s commentary is the foundational Eastern-Jìn Xuánxué 玄學 reading of the Lièzǐ. His approach is characteristically xuánxué-influenced — integrating Yì jīng cosmology (especially the Tài yì 太易 → Tài chū 太初 → Tài shǐ 太始 → Tài sù 太素 sequence of primordial stages) with Zhuāngzǐ metaphysics, with strong echoes of Wáng Bì’s 王弼 (王弼) Lǎozǐ-interpretive framework.
Family and lineage. Zhāng Zhàn’s mother was a cousin (cóng zǐ mèi 從姊妹) of Wáng Bì 王弼 — the foundational xuánxué philosopher and Lǎozǐ-Yì commentator. This familial connection is recorded in Zhāng’s own preface to his commentary. Through this maternal link, Zhāng was fluent in the míng lǐ 名理 philosophical discourse that Wáng Bì had established.
Authorship of the received Lièzǐ itself. A. C. Graham’s foundational philological study (“The Date and Composition of Liehtzyy,” Asia Major n.s. 8, 1961) demonstrated that the received Lièzǐ is itself a c. 300–370 CE Eastern-Jìn forgery, probably composed by Zhāng Zhàn’s grandfather or father. The textual evidence includes: (1) the Lièzǐ’s incorporation of materials drawn from the Zhuāngzǐ, Lǚshì chūnqiū, Huáinán zǐ, and Buddhist texts (especially the Sūtra of the Wise and the Foolish, which furnishes the “Yú Gōng moves the mountain” parable); (2) the absence of pre-Jìn witnesses to many of the Lièzǐ’s distinctive phrases; (3) the integration of Buddhist eschatological vocabulary not available to a Warring-States author. Zhāng Zhàn’s own commentary — “the first to the received text” — is therefore probably the first external commentary on a text that his own immediate family had created.
Work. His Lièzǐ zhù 列子注 — preserved in all subsequent editions of the Lièzǐ, including KR5c0049, KR5c0123, and KR5c0125 — is his only substantial surviving work. Philosophically it develops a sophisticated xuánxué 玄學 reading of the Lièzǐ that draws on Wáng Bì’s Lǎozǐ exegesis and Guō Xiàng’s 郭象 (郭象) Zhuāngzǐ tradition, fusing the three classical xuán interpretations into a unified Eastern-Jìn Daoist-philosophical system.
Assessment. The Qīng Sìkù editors (see KR5c0125) rank Zhāng Zhàn’s commentary as “second only to Wáng Bì’s Lǎozǐ commentary” — a high accolade that places his work alongside the two canonical xuán commentaries (Lǎozǐ Wáng Bì, Zhuāngzǐ Guō Xiàng).
Source. Jìn shū 晉書 75.1977 (biographical notice). No CBDB record given the early-medieval dates.