Zhāng Cóngzhèng 張從正 (zì Zǐhé 子和, hào Dàirén 戴人, ca. 1156–1228, 金), Jīn-period physician of Suīzhōu Kǎochéng 睢州考城 (modern Hénán); the second of the canonical JīnYuán “Four Masters” and founder of the Gōngxià school (攻下派) — the school of “purgative-attack” therapy. Briefly served as Imperial Physician (Tàiyī) under Jīn Xuānzōng’s Xìngdìng reign (1217–1222) before resigning. Worked closely with Má Zhījī 麻知幾 and Cháng Zhòngmíng 常仲明 on medical theory. Author of the foundational Rúmén shìqīn 儒門事親 (KR3e0051, 15 juan) — the doctrinal manifesto of the Gōngxià school. Following Liú Wánsù’s school in cooling-cooling pharmacotherapy preference, Zhāng Cóngzhèng developed the systematic doctrine that disease ought to be eliminated by the three methods of sweating, vomiting, and purging (汗吐下 hàntǔxià) before any tonification (補) is attempted — a position summarizing the most aggressive pole of JīnYuán therapeutic thinking. The work was extensively criticized in his time and by later authors (Zhū Zhènhēng, “Dānxī”) as overly aggressive. Catalog gives fl. 1217–1231; corrected here to lifedates ca. 1156–1228.