Zhāng Ěrqí 張爾岐 (1612–1677), zì Jì ruò 稷若, hào Hāo’ān 蒿庵, was an early-Qīng Confucian scholar of Jǐ yáng 濟陽 (Shān dōng), best known for his Yí lǐ Zhèng zhù jù dòu 儀禮鄭註句讀 — a punctuated edition of the Yí lǐ with Zhèng Xuán’s commentary. A Míng loyalist who refused Qīng service, he lived as a recluse-scholar. Author of KR5c0385 Lǎo zǐ shuō lüè 老子說略 — a deliberately unadorned reading-notes commentary on the Dào dé jīng, composed summer 1669 (Kāng xī 8). (CBDB has his deathdate as 1677; the catalog meta gives 1678, followed here with brief note of the discrepancy.)