《资治通鉴·唐纪·唐纪二十八》
乙亥，玄宗将 长从宿卫 之士改名为 骑 ，分别隶属于十二卫，总兵员为十二万人，分为六番，轮流值勤。
乙亥，更命长从宿卫之士曰 彍骑 ，分隶十二卫，总十二万人为六番。
On the day of Yi Hai, Emperor Xuanzong changed the name of the Chang Cong Su Wei soldiers to Qi Bing, and they were divided under the twelve Wei. The total number of soldiers was 120,000, and they were divided into six shifts, taking turns on duty.