In 756 prince Song Detsän was crowned Emperor with the name Trisong Detsen (Khri srong lde brtsan) and took control of the government when he attained his majority at 13 years of age (14 by Western reckoning) after a one-year interregnum during which there was no emperor.
I 756 blev prins Song Detsän kåret til kejser med navnet Trisong Detsen (Khri sron lde brtsan) og tog kontrol over regeringen, da han nåede sin myndighedsalder som 13-årig (14-årig efter vestlig regning) efter et års interregnum, under hvilken der ikke var nogen kejser.