百丈清規

The Bǎizhàng qīngguī — attributed to the Táng Chán master Bǎizhàng Huáihǎi 百丈懷海 (720–814) — is the foundational Chinese-Buddhist monastic code (qīngguī 清規, “pure rules”) from which all subsequent East-Asian monastic regulations derive, including the Tiāntái-school jiàoyuàn parallel codes such as the Zēngxiū jiàoyuàn qīngguī (KR6d0244). The earliest text is lost; the canonical Yuán-period recension is the Chìxiū Bǎizhàng qīngguī 勅修百丈清規 (KR6q0102) compiled by Déhuī 德煇.