During his reign (755-797), he welcomed two Indian masters and Lian Peanut, and established the Sangye Temple and the monks' alliance. During this period, there was an argument between Indian Buddhism and Han Buddhism, and finally Indian Buddhism won with the support of Zanpu.
Buddhism was further developed during the reign of Chizu Dezan (8 15-838). During the period of Zampadama, his successor, Buddhism suffered a severe blow, but after about a hundred years, Buddhism in Wei-Zang area is still inseparable.
In the 10 century, Buddhism gradually transferred its precepts from Xikang, Qinghai and Ali to Weizang. At the same time, some people went to India to seek dharma, and invited Adi Gorge from India to Tibet, mainly to teach the teachings of Xianzong and Tantric Sect.
In this way, Buddhism gradually revived in Tubo and developed into Tibetan Buddhism with unique plateau ethnic characteristics. Moreover, since the 1 1 century, various sects have been formed one after another, and it was not until the Gelug Sect was formed at the beginning of the15th century that the various factions of Tibetan Buddhism were finally finalized.
In the early stage, there were four major schools, such as Ma Ning School, Katanga School, Sakya School and Kagyu School, and there were many other schools in the later stage, such as Gelug School. After the rise of Gelug Sect, Gadang Sect merged into Gelug Sect and did not exist alone. The factional differences of Tibetan Buddhism are different from those of the eighteen schools of Indian Hinayana because of different precepts, and also different from those of Indian Mahayana because of different doctrines.
Factional differences are caused by internal Buddhist factors such as different teachers, different professors, different classics and different understandings of classics, and external factors such as different regions and different donors.