史子翬
Shǐ Zǐhuī 史子翬, fl. mid-thirteenth-century Sòng. Author of the back-colophon (dated 1248) to 稅與權 Shuì Yúquán’s Yì xué qǐméng xiǎo zhuàn (KR1a0057); developed the QiánKūn nàjiǎ 乾坤納甲 numerology argument that “the number 9 is concealed within 6” by way of 1+3+5 = 9.