Late-Míng numismatist; zì Zìyù 自玉. Biography not transmitted; the Sìkù editors note that “his rank and place are unknown.” Dated by internal evidence to the late-Wànlì through Chóngzhēn era. Author of the Qián tōng 錢通 (KR2m0046), the most comprehensive surviving pre-Qīng Chinese monograph on coinage.