Bái Pǔ 白樸 (1228 – c. 1307), zì Rénfǔ 仁甫 (or Tàisù 太素), hào Lángǔ 蘭谷, of Zhēndìng 真定 (modern Hébĕi). One of the canonical “Four Great Masters” of Yuán zájù drama — Yuánqǔ sì dà jiā 元曲四大家 — together with Guān Hànqīng 關漢卿, Mǎ Zhìyuǎn 馬致遠, and Zhèng Guāngzǔ 鄭光祖. His father, Yùzhāi 寓齋, served the Jīn as Shūmìyuàn pànguān 樞密院判官; in the chaos of the Jīn collapse Pǔ was separated from his parents and brought up in the household of the great Jīn scholar Yuán Hǎowèn 元好問, who became his master. Bái refused to serve the Mongol Yuán and moved south to Jīnlíng (Nánjīng), where he passed the remainder of his life in literary retirement. He is the author of two of the most famous of all Yuán plays — Wútóng yǔ 梧桐雨 (the Chánghèngē dramatized) and Qiángtóu mǎshàng 牆頭馬上 — and of the cí collection Tiānlài jí KR4j0059. Zhū Yízūn 朱彝尊 re-edited the Tiānlài jí and arranged it in two juǎn on its rediscovery in the early Kāngxī; the Sìkù editors ranked Bái’s cí alongside Zhāng Yán’s Yùtián cí and judged Bái “above his master” Yuán Hǎowèn in the cí genre. CBDB 10777 gives 1228–1307.