《旧唐书·本纪·卷八》
二十八日，凉州都督王君在青海之西攻破吐番，缴获辎车、马羊而回。
辛丑，凉州都督王君掞破吐蕃于青海之西，虏辎车、马羊而还。
On the twenty-eighth, the Liangzhou Dudu Wang Jun attacked and defeated the Tubo to the west of Qinghai, capturing their vehicles, horses, and sheep.