《资治通鉴·唐纪·唐纪二十七》
丁酉，唐玄宗任命左羽林大将军郭虔兼任安西大都护、安西四镇经略大使。
丁酉，以左羽林大将军郭虔瓘兼安西大都护、四镇经略大使。
On dingyou day, Emperor Xuanzong of the Tang Dynasty appointed Guo Qian, the great general of the left feather forest, as the great protector of Anxi, and the great ambassador of Anxi's four towns.