Qīngyuán Xíngsī 青原行思

Táng Chán master (d. 740), Dharma heir of the Sixth Patriarch Huìnéng 慧能; founder of the lineage from which the Cáodòng 曹洞, Yúnmén 雲門, and Fǎyǎn 法眼 houses descend.