Kǒng Jìhán 孔繼涵
Style name Tǐshēng 體生, sobriquet Hónggǔ 葒谷. Native of Qūfù 曲阜 (Shāndōng) — direct descendant of Kǒngzǐ in the 69th generation. Born Qiánlóng 4 (1739); died Qiánlóng 48 (1783). CBDB id 72804 confirms the lifedates.
Jìnshì of Qiánlóng 36 (1771); served as Hùbù zhǔshì (Secretary in the Board of Revenue). Married to 戴震 Dài Zhèn’s daughter — his marriage made him part of the inner circle of the mid-Qián-lóng kǎozhèng movement. He was one of 戴震 Dài Zhèn’s principal scholarly patrons, providing the publication funds for Dài’s collected works (the Dàishì yíshū 戴氏遺書) and editing the works through publication after Dài’s death.
A philological scholar in the kǎozhèng tradition with substantial interests in mathematics and metrology. His principal mathematical work is the Tóngdù jì 同度記 (KR3fc040) in 4 juàn — an evidential-philological study of the ancient Chinese measurement system (tóngdù 同度, “uniform measure”). The work belongs to the same kǎozhèng intellectual lineage as Dài Zhèn’s KR3fc038 Gōugǔ gēyuán jì and Dài Zhèn’s measurements-and-weights work in the Kǎogōng jì túzhù; through Kǒng Jìhán’s editorial work the DàiKǒng mathematical-philological program reached its mature form.
Kǒng Jìhán also edited a series of SòngYuán evidential-research source materials in the Wēibōxiè cóngshū 微波榭叢書, which he published in the 1770s and 1780s. The cóngshū contains the first widely-circulating Qīng edition of 李冶 Lǐ Yě’s KR3f0042 Cèyuán hǎijìng and several other SòngYuán mathematical works recovered from the Yǒnglè dàdiǎn — preceding the more famous 1842 Yíjiātáng cóngshū by several decades and laying the groundwork for the Yángzhōu circle’s SòngYuán recovery work.