人子須知
Rénzǐ xūzhī (What a Son Must Know) — Confucian/genealogical handbook of filial duty, here referenced as the foundational primer given by Hú Tíngguāng’s father in his autobiographical Fánlì to KR3el011 Shāngkē huìzuǎn. Most commonly identifies the Míng work of 徐善繼 / 徐善述 (a Jiāngxī kānyú / geomantic-genealogical treatise of Wànlì era); other Qīng titles by the same name also circulated as household instructional texts. Stub pending closer identification of the recension intended.