Tóngjūn 桐君
Legendary pharmacological authority of mythic Chinese antiquity, conventionally placed among the disciples or contemporaries of Huángdì 黃帝 黃帝. Bibliographies from the Suí shū jīngjí zhì onward list a Tóngjūn cǎiyào lù 桐君採藥錄 (“Tóngjūn’s record of drug-gathering”), now lost, as one of the foundational Hàn–Wèi yàolù fragments alongside those attributed to Cài Yōng 蔡邕 蔡邕 and Lǐ Dāngzhī 李當之 李當之. Tóngjūn’s opinions on flavour, temperature, and toxicity of drugs are routinely cited in the multi-authority entries of 《吳普本草》 (KR3ec002) — usually paired with Léi Gōng 雷公 雷公 and Qí Bó 岐伯 岐伯 — and through that channel preserved in 《證類本草》 (KR3e0028) and 《本草綱目》 (KR3e0079). Modern scholarship treats Tóngjūn as a culture-hero attribution rather than a historical figure.