At this period, large monasteries began to be established in North China, and nine-tenths of the common people, says the historian, followed the faith of the great Indian sage.
Under the year A.D. 405, the Chinese chronicles record that the king of the Ts'in country gave a high office to Kumarajiva, an Indian Buddhist. This is an important epoch for the history of Chinese Buddhist literature. Kumarajiva was commanded by the emperor to translate the sacred books of India, and to the present day his name may be seen on the first page of the principal Buddhist classics. The seat of the ancient kingdom of Ts'in was in the southern
part of the provinces Shen-si and Kan-su. Ch'au, another kingdom where, a few years previously, Buddhism was in favour at court, was in the modern Pe-chi-li and Shan-si. That this religion was then flourishing in the most northerly provinces of the empire, and that the date, place (Ch'ang-an), and other circumstances of the translations are preserved, are facts that should be remembered in connection with the history of the Chinese language. The numerous proper names and other words transferred from Sanscrit, and written with the Chinese characters, are of great assistance in ascertaining what sounds were then given to those characters in the region where Mandarin is now spoken.
Kumarajiva was brought to China from Kui-tsi, a kingdom in Thibet, east of the Ts'ung-ling mountains. The king of Ts'in had sent an army to invade that country, with directions not to return without the Indian whose fame had spread among all the neighbouring nations. The former translations of the Buddhist sacred books were to a great extent erroneous. To produce them in a form more accurate and complete was the task undertaken by the learned Buddhist just mentioned, at the desire of the king. More than eight hundred priests were called to assist, and the king himself, an ardent disciple of the new faith, was present at the conference, holding the old copies in his hand as the work of correction proceeded. More than three hundred volumes were thus prepared.
While this work, so favourable to the progress of Buddhism, was proceeding, a Chinese traveller, Fa-hien, was exploring India and collecting books. The extension of the religion that was then propagated with such zeal and fervour very much promoted the mutual intercourse of Asiatic countries. The road between Eastern Persia and China was frequently traversed, and a succession of Chinese Buddhists thus found their way to the parent