Some time after this the Sixth Patriarch settled himself down at the Pao Lin Monastery, better known as Tsao Ki Shan (So-kei-zan), in Shao Cheu, and it grow into a great centre of Zen in the Southern States. Under his instruction many eminent Zen masters qualified themselves as Leaders of the Three Worlds. He did not give the patriarchal symbol, the Kachaya, to his successors, lest it might cause needless quarrels among the brethren, as was experienced by himself. He only gave sanction to his disciples who attained to Enlightenment, and allowed them to teach Zen in a manner best suited to their own personalities. For instance, Huen Kioh (Gen-kaku), a scholar of the Tien Tai doctrine,[FN#47] well known as the Teacher of Yung Kia[FN#48] (Yo-ka), received a sanction for his spiritual attainment after exchanging a few words with the master in their first interview, and was at once acknowledged as a Zen teacher. When he reached the zenith of his fame, he was presented with a crystal bowl together with rich gifts by the Empress Tseh Tien; and it was in A.D. 705 that the Emperor Chung Tsung invited him in vain to proceed to the palace, since the latter followed the example of the Fourth Patriarch. [FN#47] The Teacher of Tien Tai (Ten-dai, A.D. 538-597), the founder of the Buddhist sect of the same name, was a great scholar of originality. His doctrine and criticism on the Tripitaka greatly influenced the whole of Buddhism after him. His doctrine is briefly given in the second chapter. [FN#48] His Ching Tao Ko (Sho-do-ka), a beautiful metrical exposition of Zen, is still read by most students of Zen. After the death[FN#49] of the Sixth Patriarch (A.D. 713), the Southern Zen was divided into two schools, one being represented by Tsing Yuen (Sei-gen), the other by Nan Yoh (Nan-gaku.) Out of these two main schools soon developed the five[FN#50] branches of Zen, and the faith made a splendid progress. After Tsing Yuen and Nan Yoh, one of the junior disciples of the Sixth Patriarch, Hwui Chung (E-chu), held an honourable position for sixteen years as the spiritual adviser to the Emperor Suh Tsung (A.D. 756762) and to the Emperor Tai Tsung (A.D. 763-779). These two Emperors were enthusiastic admirers of Zen, and ordered several times the Kachaya of Bodhidharma to be brought into the palace from the Pao Lin Monastery that they might do proper homage to it. Within some one hundred and thirty years after the Sixth Patriarch, Zen gained so great influence among higher classes that at the time of the Emperor Suen Tsung (A.D. 847-859) both the Emperor and his Prime Minister, Pei Hiu, were noted for the practice of Zen. It may be said that Zen had its golden age, beginning with the reign of the Emperor Suh Tsung, of the Tang dynasty, until the reign of the Emperor Hiao Tsung (1163-1189), who was the greatest patron of Buddhism in the Southern Sung dynasty. To this age belong almost all the greatest Zen scholars[FN#51] of China.