Dayang Jingxuan dating history

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Dayang Jingxuan (simplified Chinese: 大阳警玄; traditional Chinese: 大陽警玄; Japanese: Taiyo Keigen) was a Chan (Zen) Buddhist monk during the early Song dynasty. During his life, he was apparently the only living teacher representing Caodong/Sōtō school, and he was the last monk of that tradition to be mentioned in the influential Transmission of the Lamp, compiled in 1004. However, as that work was compiled during his lifetime, it lacked biographical information. A biography did not appear until the Xudeng lu of 1101. He left his birth city to become a monk at Chongxiao Temple in Jinling. His teacher there was named Zhitong, but Dayang soon left when he was 19. He studied with Yuanjiao Liaoyi for a time, but eventually moved on, finally settling on Liangshan Yuanguan as his teacher.