Zhào Yízhēn 趙宜真 (hào Yuányángzǐ 原陽子; d. 1382) was one of the most influential Daoist patriarchs of the late Yuán and early Míng, and the key figure in the late-Yuán transmission of the Qīngwēi 清微 school and in the Jìngmíng 淨明 and Quánzhēn 全真 lineages into the Míng. A pupil of the late-Yuán Qīngwēi master Zhāng Tiānquán 張天全 and the inheritor of multiple lineage transmissions, Zhào integrated the Qīngwēi thunder-ritual tradition, the Quánzhēn nèidān 內丹 doctrine, and the Jìngmíng-school filial-piety emphasis in his own teaching. He was the direct master of Liú Yuánrán 劉淵然 (d. 1462), the early-Míng Quánzhēn patriarch, whose lineage ran thence through to Shào Yǐzhèng 邵以正 (d. 1462), and so to the Ming Daoist hierarchy. He was also known for medical expertise (cf. DZ 1165 Xiānchuán wàikē bìfāng 仙傳外科祕方 and DZ 1311 Xiānquán jí 仙泉集 4.11a).
His known works include:
- Yuányángzǐ fǎyǔ 原陽子法語 (DZ 1071) — his collected instructional teachings.
- Língbǎo guīkōng jué 靈寶歸空訣 (DZ 568) — Língbǎo instructions for returning to the void, fourteen songs with commentaries (28-character songs); Zhào edits a text originally misattributed to Bodhidharma.
- Xuántiān shàngdì shuō bào fùmǔ ēn zhòng jīng 玄天上帝說報父母恩重經 (DZ 663, KR5c0044) — the Daoist filial-piety scripture authored under the revelatory voice of Xuántiān Shàngdì.
For a biographical treatment, see Kristofer Schipper, “Master Chao I-chen (?–1382) and the Ch’ing-wei School of Taoism,” in Dōkyō to shūkyō bunka 道教と宗教文化, ed. Akizuki Kan’ei 秋月観暎 (Tōkyō: Hirakawa, 1987), 715–34.
No confident CBDB match has been identified in the local dump under the exact name-form 趙宜真; further disambiguation work is needed.