Yunmen Wenyan (; romaji: Ummon Bun'en; 862 or 864 – 949 CE), was a major Chinese Chan master of the Tang dynasty. He was a dharma-heir of Xuefeng Yicun. Yunmen founded the Yunmen school, one of the five major schools of Chán (Chinese Zen). The name is derived from Yunmen monastery of Shaozhou where Yunmen was abbot. The Yunmen school flourished into the early Song Dynasty, with particular influence on the upper classes, and eventually culminating in the compilation and writing of the Blue Cliff Record. The school would eventually be absorbed by the Linji school later in the Song. The lineage still lives on to this day through Chan Master Hsu Yun (1840–1959). Biography Early years Yunmen was born in the town of Jiaxing near Suzhou and southwest of Shanghai to the Zhang family, apparently in 864 CE. His birth year is uncertain. The two memorial stele at the Yunmen monastery states he was 86 years old when he died in 949 CE, which suggests that he was born in 864 CE. Initial Zen-studies While a boy, Yunmen became a monk under a "Commandment master" named Zhicheng in Jiaxing. He studied there for several years, taking his monastic vows at age 20, in 883 CE. The teachings there did not satisfy him, and he went to the school of Reverend Muzhou Daoming (Chinese: 睦州道明; Pinyin: Mùzhōu Dàomíng), also known as Muzhou Daozong (Chinese: 睦州道蹤; Pinyin: Mùzhōu Dàozōng) to gain enlightenment. According to legend, first mentioned in 1100, he had his leg broken for his trouble: Daoming told Yunmen to visit the pre-eminent Chan master of the day, Xuefeng Yicun of Mount Xianggu, in Fuzhou in modern-day Fujian Province, and become his disciple, as Daoming was by then too old (~100 years old) to further teach Yunmen. After a few years studying with him, Yunmen did so, and received enlightenment after several years. Advanced Zen-studies While Yunmen had received his teacher's seal of approval, he nevertheless did not become abbot, probably because he had only stayed there for 4 or 5 years. When Xuefeng Yicun died, Yunmen began travelling and visited quite a number of monasteries, cementing his reputation as a Chan master. During a subsequent visit to the tomb of the Sixth Patriarch in Guangdong, Yunmen eventually joined (c. 911 CE) the monastery of Rumin Chanshi/Ling-shu Ju-min, who died in 918 CE. They became great friends. With his death,