《资治通鉴·唐纪·唐纪六十四》
吐蕃占领的秦、原、安乐三州以及石门等七座关隘遣使向唐朝投降。
吐蕃秦、原、安乐三州及石门等七关来降。
The three prefectures of Qin, Yuan, and Anle, as well as the seven passes including Shimen that had fallen to the Tubo, sent envoys to surrender to the Tang dynasty.