Zhāng Dàxī 張大爔 (hào Àilú 愛廬, “the Loved Cottage”, fl. mid 19th c., late Qīng), Sūzhōu (GǔWú 古吳) physician of the immediate pre-Tài-píng era. His clinical case-record formulary Línzhèng jīngyàn fāng 臨證經驗方 (KR3ed134) was preserved by his disciple 黃壽南 (Huáng Shòunán) in a manuscript copy of early summer 1852. The self-preface displays a sophisticated military-strategy analogy to medicine — “the strategist gauges the enemy in order to obtain victory; the physician gauges the disease in order to establish the formula” — and demonstrates methodological eclecticism between orthodox-treatment and reverse-treatment approaches. Zhāng’s specific position on wēnyì (epidemic pestilence) — that the true Wú Yòukě plague-wēnyì is rarely seen in southern China and arises only after famine — is interesting evidence for mid-19th-century Sūzhōu clinical understandings of Wēnbìng. Sparse further biographical record.