5. As in other countries, so in China Buddhism entered by more than one road. It came first by land from Central Asia. The official date for its introduction by this route is 62 A.D. but it was probably known within the Chinese frontier before that time, though not recognized by the state. Secondly when Buddhism was established, there arose a desire for accurate knowledge of the true Indian doctrine. Chinese pilgrims went to India and Indian teachers came to China. After the fourth century many of these religious journeys were made by sea and it was thus that Bodhidharma landed at Canton in 520[13]. A third stream of Buddhism, namely Lamaism, came into China from Tibet under the Mongol dynasty (1280). Khubilai considered this the best religion for his Mongols and numerous Lamaist temples and convents were established and still exist in northern China. Lamaism has not perhaps been a great religious or intellectual force there, but its political importance was considerable, for the Ming and Manchu dynasties who wished to assert their rule over the Tibetans and Mongols by peaceful methods, consistently strove to win the goodwill of the Lamaist clergy. The Buddhism of Korea, Japan and Annam is directly derived from the earlier forms of Chinese Buddhism but was not affected by the later influx of Lamaism. Buddhism passed from China into Korea in the fourth century and thence to Japan in the sixth. In the latter country it was stimulated by frequent contact with China and the repeated introduction of new Chinese sects but was not appreciably influenced by direct intercourse with Hindus or other foreign Buddhists. In the twelfth and thirteenth centuries Japanese Buddhism showed great vitality, transforming old sects and creating new ones. In the south, Chinese Buddhism spread into Annam rather late: according to native tradition in the tenth century. This region was a battlefield of two cultures. Chinese influence descending southwards from Canton proved predominant and, after the triumph of Annam over Champa, extended to the borders of Camboja. But so long as the kingdom of Champa existed, Indian culture and Hinduism maintained themselves at least as far north as Hué. 6. The Buddhism of Tibet is a late and startling transformation of Gotama's teaching, but the transformation is due rather to the change and degeneration of that teaching in Bengal than to the admixture of Tibetan ideas. Such admixture however was not absent and a series of reformers endeavoured to bring the church back to what they considered the true standard. The first introduction is said to have occurred in 630 but probably the arrival of Padma Sambhava from India in 747 marks the real foundation of the Lamaist church. It was reformed by the Hindu Atîśa in 1038 and again by the Tibetan Tsong-kha-pa about 1400.