[FN#49] There exists Luh Tan Fah Pao Tan King (Roku-so-ho-bo-dan-kyo), a collection of his sermons. It is full of bold statements of Zen in its purest form, and is entirely free from ambiguous and enigmatical words that encumber later Zen books. In consequence it is widely read by non-Buddhist scholars in China and Japan. Both Hwui Chung (E-chu), a famous disciple of the Sixth Patriarch, and Do-gen, the founder of the Soto Sect in Japan, deny the authority of the book, and declare it to be misleading, because of errors and prejudices of the compilers. Still, we believe it to be a collection of genuine sections given by the Sixth Patriarch, though there are some mistakes in its historical narratives. [FN#50] (1) The Tsao Tung (So-to) Sect, founded by Tsing Yuen (died in A.D. 740) and his successors; (2) the Lin Tsi (Rin-Zai) Sect, founded by Nan Yoh (died in 744) and his successors; (3) the Wei Yan (Yi-gyo) Sect, founded by Wei Shan (Yi-san, died in 853) and his disciple Yen Shan (Kyo-zan, died in 890); (4) the Yun Man (Un-mon) Sect, founded by Yun Man (died in 949); (5) the Pao Yen (Ho-gen) Sect, founded by Pao Yen (died in 958). [FN#51] During the Tang dynasty (A.D. 618-906) China produced, besides the Sixth Patriarch and his prominent disciples, such great Zen teachers as Ma Tsu (Ba-so, died in 788), who is probably the originator of the Zen Activity; Shih Teu (Seki-to, died in 790), the reputed author of Tsan Tung Ki (San-do-kai), a metrical writing on Zen; Poh Chang (Hyaku-jo, died 814), who first laid down regulations for the Zen Monastery; Wei Shan (Yi-san), Yang Shan (Kyo-zan), the founders of the Wei Yang Sect; Hwang Pah (O-baku, died in 850), one of the founders of the Lin Tsi Sect, and the author of Chwen Sin Pao Yao, (Den-sin-ho-yo), one of the best works on Zen; Lin Tsi (Rin-zai, died in 866), the real founder of the Lin Tsi Sect; Tung Shan (To-zan, died in 869), the real founder of the Tsao Tung Sect; Tsao Shan (So-zan, died in 901), a famous disciple of Tung Shan; Teh Shan (Toku-san, died in 865), who was used to strike every questioner with his staff; Chang Sha (Cho-sha, died in 823); Chao Cheu (Jo-shu, died in 897); Nan Tsuen (Nan-sen, died in 834); Wu Yeh (Mu-go, died in 823); who is said to have replied, 'Away with your idle thoughts,' to every questioner; Yun Yen (Un-gan, died in 829); Yoh Shan (Yaku-san, died in 834); Ta Mei (Tai-bai, died in 839), a noted recluse; Ta Tsz (Dai-ji, died in 862); Kwei Fung (Kei-ho, died in 841), the author of 'The Origin of Man,' and other numerous works; and Yun Ku (Un-go, died in 902).