Late-Míng calligrapher and connoisseur, son of the dominant mid-Míng painting collector 項元汴 (Xiàng Yuánbiàn, 1525–1590, hào Mòlín 墨林). Active in the late 16th century. His given name underwent successive changes — first Dézhī 德枝, then renamed Chún 純 by jùndàfū Xúgōng, finally Mù 穆; zì Déchún 德純; hào Zhēnyuán 貞元 / Wúxiézǐ 無邪子. Of Xiùshuǐ 秀水 in Jiāxīng 嘉興 (modern Zhèjiāng). Inherited his father’s connoisseurship — the Mòlín seal-impressions on calligraphic and pictorial originals remain the principal modern criterion for distinguishing authentic Yuán-Míng works. Author of KR3h0050 Shūfǎ yǎyán 書法雅言 in 17 piān, the systematic statement of the family connoisseur’s calligraphic doctrine — pro-Jìn, anti-Sòng “edges and angles,” anti-Yuán “cold-and-skimpy” — and an important late-Míng theoretical source for the Kāngxī Pèiwénzhāi shūhuà pǔ KR3h0061. Biographical short note by Wáng Zhìdēng 王穉登.