Bái yún zhāi 白雲齋 — the studio-name of the Míng bibliographer Bái Yúnjì 白雲霽, compiler of KR5g0239 Dào zàng mù lù xiáng zhù 道藏目錄詳註 — a detailed annotated catalogue of the Dào zàng, the standard premodern catalog of the Daoist canon. Catalog meta has “Bái yún zhāi” as author.