Tiān yuán fā wēi 天原發微

Subtle Exposition of the Heaven-Origin

by 鮑雲龍 (Bào Yúnlóng, 1226–1296)

A Southern-Sòng / Yuán cosmological-diagrammatic treatise on the origin of heaven, drawing on Yì jīng, Shào Yōng, and Zhū Xī. Preserved as DZ 1182 / CT 1182 (Tài qīng bù 太清部).

Dating. Late 13th century. Dynasty: 南宋-元.