“In order to cater for the taste of the ordinary people, themodes of the Bon religion, Terdrung and Drungkhen were appliedto lead the Tubo people to worship Buddhism; while, for thepurpose of the study of later generations, Buddhist sutras, mantras,Bon scriptures, treasures and imperial edicts were respectivelyburied between the four pillars, under the Mandala and in theDragon Temple.”[13] It is not difficult to see that Buddhism spreadvia religious rituals of the Bon religion, and didn’t give full play ofits special religious functions at the time.