Zhézhōng lìfǎ 折衷曆法
A Reconciled Calendar Method by 朱仲福 (撰)
About the work
The Zhézhōng lìfǎ 折衷曆法, in sixteen juàn, is a Míng-period treatise by Zhū Zhòngfú 朱仲福 attempting an “eclectic” or “reconciled” (zhézhōng 折衷) approach to calendrical computation — explicitly framed as a private commoner’s contribution to a body of learning that the late-Míng court had largely failed to maintain. The work opens with an extended polemical preface — also functioning as the work’s intellectual self-justification — that surveys the genealogy of Chinese calendrical authority from the legendary sage-rulers down to its own day, and mounts a sustained defence of the legitimacy of private mathematical-astronomical learning.
Abstract
The opening preface traces the calendrical transmission from Fúxī, Yándì, Xuānyuán, Shàohào, Zhuānxū, Dìkù, Yáo, Shùn, Yǔ, Tāng-and-Wǔ, down through Confucius and Zuǒ Qiūmíng — citing canonical loci including the Zuǒzhuàn “huǒ fú ér hòu zhé” 火伏而後蟄 and the Mèngzǐ “the height of heaven and the distance of the stars … one can sit and obtain the solstices a thousand years hence” 天之高也…千歲之日至可坐而致也. It then turns to the polemical core: a sustained refutation of Ōuyáng Xiū’s 歐陽修 Sòng-era claim (in the Xīn Wǔdài shǐ and elsewhere) that calendar studies had decayed by his day into the hands of yīnyáng practitioners and lost their classical respectability.
Zhū’s argument is to distinguish carefully between the legitimate tuībù 推步 (computational ephemerides — that is, the determination of the celestial positions and the new-moons, intercalations and solar nodes) and the proscribed zhànyàn 占驗 (mantic prognostication based on celestial events). The throne’s traditional ban on private yīnyáng study, he insists, applies only to the latter; tuībù is the canonical responsibility of literate-elite learning and not subject to the prohibition. The framing is recognisable as a recurrent late-Míng concern, voiced in similar terms by Xíng Yúnlù 邢雲路 (KR3fb012) and others, and reflects the particular vulnerability of private calendrical scholars to denunciation in the late Wànlì period.
CBDB returns no record for Zhū Zhòngfú; the Míngrén zhuànjì indexes consulted yield no biographical detail. The polemical posture (which presupposes Ōuyáng Xiū’s reception and the late-Míng relaxation of restrictions on private mathematical-astronomical learning) places the work in the mid-to-late Míng. NotBefore is set conservatively at 1450; notAfter at 1620 (the eve of the Chóngzhēn reform), within which range the dating cannot be further refined on internal evidence.
Translations and research
No substantial secondary literature located. The text is briefly noted in surveys of late-Míng calendrical pluralism (e.g. Chén Měidōng 陳美東, Zhōngguó kēxué jìshù shǐ: Tiān-wén-xué juǎn 中國科學技術史·天文學卷, Beijing 2003) but has not been the subject of a dedicated study.
Other points of interest
The work’s title — Zhézhōng 折衷, “Reconciled / Eclectic” — was a deliberate signalling word in late-Míng technical learning: it claimed for the work the prestige of synthesising competing schools (in this case the Dàtǒng official tradition, the residual Huíhuí lì methods, and assorted private tuībù schools), against the more partisan methodological positions of figures such as Wèi Wénkuí 魏文魁 or Xíng Yúnlù.