Lǐ Zhèntíng 李振霆 (hào Běitíng 北亭), late-Qīng scholar of Sìmíng 四明 (Níngbō, Zhèjiāng). Prefaced Yè Lín 葉霖’s specialty paediatric treatise Shāzhěn jíyào 痧疹輯要 (KR3ej049) in 1890 (Guāngxù gēngyín 庚寅 mùchūn zhī chū — early third lunar month). His preface is one of the more substantive contemporary witnesses for Yè Lín’s biographical context and intellectual reception. Lifedates and other biographical detail not securely recorded.