Kumbum Monastery
Legend states that Trisong Detsen (742–797) invited Moheyan to teach at Samye. Moheyan had been teaching at Dunhuang, which the Tibetan Empire had conquered in 786, but he lost an important philosophical debate on the nature of emptiness from the Indian master Kamalaśīla and the king declared Kamalaśīla's philosophy should form the basis for Tibetan Buddhism rather than Chan. This legendary "great debate" was known as "the Council of Lhasa" and is narrated and depicted in a specific cham dance held annually at Kumbum Monastery, Qinghai.