Táng Kāiyuán zhànjīng 唐開元占經
The Tang Kāi-yuán-Era Divination Classic by 瞿曇悉達 (Qútán Xīdá / Gautama Siddhārtha, fl. 718–729, 唐, fèngchì zhuàn 奉敕撰)
About the work
The principal Tang-imperial divinatory-astronomical encyclopedia, in 120 juàn, compiled by the Indian-descent imperial-astronomical-bureau head Qútán Xīdá in the early-mid Kāiyuán period (713–741). The work systematically compiles Hàn-Wèi-Six-Dynasties astronomical-and-divinatory material from 70+ apocryphal-classical (chènwěi 緯書) sources, plus the foundational Líndé (Tang) and Jiǔzhí (Indian-derived) calendrical computations.
Structure (per the table-of-contents):
- Juàn 1–4: cosmological framework — Tiāntǐ húnzōng (Heaven-body Sphere-cosmology), Lùn tiān (Discussing-Heaven), Tiānzhàn (Heaven-divination), Dìzhàn (Earth-divination)
- Juàn 5–10: Rìzhàn (Sun-divination, in 6 sections)
- Juàn 11–17: Yuèzhàn (Moon-divination, in 7 sections)
- Juàn 18–22: Wǔxīng zhàn (Five-Planets-divination, in 5 sections)
- Juàn 23 onwards: planet-by-planet divination (Jupiter, Mars, Saturn, Venus, Mercury), constellation-divination (3 walls and 28 lunar-mansions), and topical-divination (eclipses, comets, atmospheric phenomena)
- Juàn 110: Xīngtú (Star-Map) — a major star catalog
- Juàn 111–120: bāgǔ zhàn (8-grain divination), lóngyúchóngshé zhàn (dragon-fish-insect-snake divination), and other natural-divination
- Juàn 104–105: full text of the Líndé lì and the Jiǔzhí lì (the latter being the only complete-and-accurate Chinese-language record of this Indian-derived calendar)
The work’s fundamental value (per the Sìkù 提要):
(a) Preservation of the apocryphal-classical literature: the Suíshū Jīngjí zhì records 81 chènwěi (apocryphal-classical) titles; the Kāiyuán zhànjīng preserves about 70+ of them in extensive citations. Without this work, most of the chènwěi literature — central to Hàn-period cosmology, divination, and politico-religious thought — would be entirely lost.
(b) The Jiǔzhí lì preservation: the Jiǔzhí (= Sanskrit Navagraha, the Nine-Planets calendar) is not recorded in the Tang Yìwén zhì and only summarily noted in other Tang-period sources; the Kāiyuán zhànjīng preserves the complete computational procedure. The Sìkù 提要 cites the work to correct the Yùhǎi’s erroneous claim that the Jiǔzhí lì used Kāiyuán 2 (714) as its calendrical-epoch — the present recension explicitly says it uses Xiǎnqìng 2 (657) as the jǐyuán.
(c) Confirmation/correction of Líndé lì details: the work preserves Líndé lì terminological-and-procedural details (zhāngsuì, zhāngyuè, bànzǒng, zhāngrùn, rùnfēn, etc.) that conflict with the Tang Lìzhì’s standard recension. The Sìkù editors take the Kāiyuán zhànjīng’s record as the more reliable, since Qútán Xīdá would have had access to the actually-current Líndé manuscripts of his time, while the Tang Lìzhì was compiled later from materials that may have been corrupted.
The work was banned-from-circulation throughout subsequent imperial Chinese history (the chènwěi material being politically dangerous as potential prophetic challenges to dynastic legitimacy). It survived in obscure manuscript transmission until the late-Míng Wàn-lì-period scholar Zhāng Yīxī 張一熙 recovered it in 1617 (Wànlì dīngsì) — Zhāng’s identification-note is preserved in the Sìkù recension: “this book through Tang to Míng [is for] roughly several hundred years; only [now] obtained — recovered from the dust by the Submerged-Origin Daoist [Yǐyuán dàorén] — not by chance”.
The 提要 acknowledges the work’s astrological-occult content as “the divinatory-art’s yìxué (heterodox-learning), not properly worth preserving” but justifies preservation on the grounds of its evidentiary-historical value: “the [astrological] technique can be discarded, [but] the book truly has things worth taking”.
For Qútán Xīdá’s biography and family lineage, see 瞿曇悉達.
Tiyao
[Full text in source file. Dated Qiánlóng 45 (1780), fifth month — early in the Sìkù compilation. Substantive content summarized above.]
Abstract
Composition window: 718 (the year Qútán Xīdá was commanded to translate the Jiǔzhí lì) – 729 (before the Tang Dàyǎn lì was promulgated in 729; the Kāiyuán zhànjīng’s reference to the Líndé lì as currently-in-use places it before the Dàyǎn promulgation).
The work’s significance:
(a) Foundational source for Hàn-Wei chènwěi literature: the work is the principal surviving compilation of pre-Sui apocryphal-classical material — making it indispensable for the study of Hàn cosmology, divination, and the chènwěi tradition that influenced later imperial-religious-political thought.
(b) Documentation of Indian-Chinese astronomical interchange: the Jiǔzhí lì (Indian Navagraha-calendar) preservation documents the Tang-period transmission of Indian astronomical-astrological practice into the Chinese imperial astronomical system, predating the Yuán-period Persian-Islamic transmission and the Míng-Qing-period European-Catholic transmission.
(c) Full Tang stellar catalog: juan 110’s Xīngtú (Star-Map) is one of the principal pre-Sòng stellar catalogs.
For other related divinatory-astronomical compilations, see KR3g0017 Língtái mìyuàn. For the broader Tang astronomical-mathematical context, see KR3f0040 Jígǔ suànjīng (the Tang independent mathematical work).
Translations and research
- Yabuuti Kiyoshi 藪內清, Chūgoku no temmon-rekihō 中国の天文暦法, Tōkyō: Heibonsha, 1969 / 1990 (treats the Tang astronomical literature including the Kāi-yuán zhàn-jīng).
- Yano Michio 矢野道雄, Kūshyār ibn Labbān’s Introduction to Astrology, Tōkyō: ILCAA, 1997 (background on Indian-Islamic astronomical material reaching China).
- Cullen, Christopher. Heavenly Numbers: Astronomy and Authority in Early Imperial China, Oxford: Oxford University Press, 2017.
- Mansvelt Beck, B. J. The Treatises of Later Han: Their Author, Sources, Contents, and Place in Chinese Historiography, Leiden: Brill, 1990 (background on the Hàn-shū astronomical tradition that the Kāi-yuán zhàn-jīng synthesizes).
- Zhōng-guó kē-xué-yuàn Zì-rán-kē-xué-shǐ yán-jiū-suǒ 中國科學院自然科學史研究所, Tang Kāi-yuán zhàn-jīng yán-jiū 唐開元占經研究 (compendium of articles).
Other points of interest
The Indian-Buddhist family-name Qú-tán (Gautama) and personal-name Xī-dá (Siddhārtha) are striking instances of the deep Indian-Buddhist influence on Tang court astronomical practice. The Qú-tán family, alongside the Jiā-yè (Kaśyapa) and Jū-mó-luó (Kumāra) families, represented an organized Indian-Buddhist astronomical sub-tradition within the Tang Imperial Astronomical Bureau — a transmission-channel parallel to the much-later Jesuit-mediated European-Catholic astronomical sub-tradition of the Míng-Qing period.
The Sìkù editors’ careful balancing — preserving the work despite its astrological-occult content because of its documentary value — represents one of the more sophisticated late-Qīng editorial assessments. The work’s reception in modern scholarship has confirmed the editors’ judgment: the Kāiyuán zhànjīng is universally acknowledged as one of the most valuable single surviving sources for pre-Tang Chinese cosmology-and-divination.