羽77=Dunhuang Text of Yu.77; 尚紇心兒=Zhang khri sum rje; 祈愿=The Monlam Prayer Festival; 缽闡布=Ban de chen po dpal gyi yon tan; 專使大判官=A Special Envoy as the Great Judge; 敦煌=Dunhuang
Dunhuang text Yu.77 consists of three pieces of votive writings by three different prayer,they were recorded three Monlam Prayer Festivals hold in Dunhuang which had related to Tibetan prime minister Zhang khri sum rje in 818 A.D.This text had showing a historic fact that Zhang khri sum rje had once wishes to resign from office in order to devoted heartfully to Buddhist service and have to give in to his post service once during his stay in Dunhuang.The text also proved that Zhang khri sum rje had stay in Dunhuang for at lest three time in his life time and had presided a project of building Shengguang Monastery in Dunhuang in his later years.
