Zhāng Sānxī 張三錫 (zì Shūchéng 叔承, hào Jiāshān 嘉山, fl. late Wànlì period, 1573–1620, 明), late-Míng physician of Nánjīng 南京. Author of the six-juan Yīxué zhǔnshéng liùyào 醫學準繩六要 (printed 1593), a comprehensive late-Míng medical synthesis combining the JīnYuán four-master pharmacotherapy tradition with the standard Míng channel-doctrine emphasis. The Jīngluò kǎo 經絡考 (KR3ee025) is the channel-doctrine pillar of that compilation and also circulated independently. No CBDB match. Standard biographical reference is in Yán Shìyún’s Zhōngyī rénwù cídiǎn.