Wèi Jùn 魏濬 (b. 1549; d. unrecorded), zì Cāngshuǐ 蒼水, was a late-Míng Yìjīng scholar and official from Sōngxī 松溪 (Jiànníng 建寧, modern Fújiàn 福建). He passed the jìnshì examination in Wànlì jiǎchén 萬曆甲辰 = 1604 and rose through provincial appointments to Right Vice Censor-in-Chief of the Censorate (Yòu qiān dū yùshǐ 右僉都御史), serving as Grand Coordinator (Xún fǔ 巡撫) of Húguǎng 湖廣. The catalog meta gives his attested period as fl. 1612.
His one surviving major work in the Sìkù is the Yì yì gǔ xiàng tōng 易義古象通 (KR1a0107) in eight juàn. The work begins with eight programmatic essays (míng xiàng zǒng lùn 明象總論) on symbol-derivation in the Yì: (1) origin of the ancient symbols; (2) principle and the transmission of symbols; (3) proper symbols of the eight trigrams; (4) the positions of the six lines; (5) the strokes of hexagram and line; (6) hexagram-variation; (7) component-trigrams (hùtǐ 互體); (8) inverted-paired and varying lines (fǎn duì dòng yáo 反對動爻). Wèi reads the work of King Wén and the Duke of Zhōu as the manifestation of principle through symbol, and the Confucian Wings as the elucidation of the symbols through principle. Methodologically he is willing to draw on the HànWèiJìnTáng tradition where it stays close to the canonical text, while rejecting the Jiāo Yánshòu / Jīng Fáng cyclical-numerology tradition.