Charles Luk often used the title
Upāsaka (), e.g. "Upāsaka Lu K'uan Yü" (), referring to his role as a devout lay follower of
Buddhism. His first Buddhist teacher was a
tulku of
Esoteric Buddhism, the Khutuktu of
Xikang. Later he became a disciple of
Xuyun, the famous inheritor of all five houses of the Chán school in China. Master Xuyun personally asked Charles Luk to translate key Chinese Buddhist texts into English, so that Western Buddhists could have access to authentic teachings to assist their practice. Upon his death in 1978, this task was taken on by his British disciple
Richard Hunn (1949–2006), also known as Upasaka Wen Shu - who edited the 1988 Element edition of Charles Luk's book entitled
Empty Cloud: The Autobiography of the Chinese Zen Master Xu Yun. ==Publications==