Yuquan Shenxiu (Chinese: 玉泉神秀; pinyin: Yùquán Shénxiù; Wade–Giles: Yü-ch'üan Shen-hsiu, 606?-706)) was one of the most influential Chan masters of his day, a Patriarch of the East Mountain Teaching of Chan Buddhism. Shenxiu was Dharma heir of Daman Hongren (601–674), honoured by Wu Zetian (r. 690-705) of the Tang dynasty, and alleged author of the Guan Xin Lun (Treatise on the Contemplation of the Mind, written between 675-700), a text once attributed to Bodhidharma.