Yuán-dynasty Daoist editor and Wùzhēn piān philologist, zì Tóngfù 同甫 (or Zhòngtóngfù 仲同父), hào Kōngxuánzǐ 空玄子. Active ca. 1335–1340; CBDB gives a flourished-latest year of 1335. Dài is the editor of DZ 141 Zǐyáng zhēnrén Wùzhēn piān zhùshū (8 juàn, ca. 1335) and the related compilation DZ 145 Wùzhēn piān zhùshì (3 juàn, postface 1336); his sustained editorial biàn 辨 (“textual investigation”) attached to DZ 143 Sānchéng bìyào (1336–1337) is one of the earliest sophisticated philological dossiers in the Daozang, disentangling the genuine Wēng Bǎoguāng commentary from the corrupt circulation under Xuē Dàoguāng’s name and assembling a substantial Jīndān fǎxiàng 金丹法象 — a classified lexicon of inner-alchemy figures gathered from the Cāntóng qì and the entire Wùzhēn piān tradition. His nephew Dài Shùn 戴順 contributed a complementary postface dated 1337. Dài’s editorial work makes the Yuán Daozang the most important single witness to the Wēng-Bǎoguāng Wùzhēn piān tradition.