Chao-chou was especially important in showing how Chʾan and Tao relate together, opening the way to creative coexistence. His enlightenment is known as funi daidō, ‘the nonduality of the great Tao’—which is a near synonym for the buddha-nature empty of self and differentiation.
"Chao-chou Tsʾung-shen." The Concise Oxford Dictionary of World Religions. . Encyclopedia.com. (February 17, 2018). http://www.encyclopedia.com/religion/dictionaries-thesauruses-pictures-and-press-releases/chao-chou-tsung-shen
"Chao-chou Tsʾung-shen." The Concise Oxford Dictionary of World Religions. . Retrieved February 17, 2018 from Encyclopedia.com: http://www.encyclopedia.com/religion/dictionaries-thesauruses-pictures-and-press-releases/chao-chou-tsung-shen