《资治通鉴·唐纪·唐纪六十六》
西川近边有蒙蛮、夷蛮、讹蛮、狼蛮、勿邓蛮、白蛮等六姓蛮，常在唐朝与南诏之间左右摇摆，首鼠两端，南诏蛮军不来侵寇时则对唐朝宣称效忠恭顺，南诏蛮军来侵寇时则常充当南诏的前锋；只有蛮族卑笼部尽心效忠于唐朝，与群蛮各族姓世代为仇，朝廷赐卑笼部姓李，任命为刺史。
四川近边六姓蛮，常持两端，无寇则称效顺，有寇必为前锋。卑笼部独尽心于唐，与群蛮为仇，朝廷赐姓李，除为刺史。
In the vincinity of Xichuan lived six tribes of the Man people, the Mengman, Yiman, Yaoman, Langman, Wudengman, and Baiman, that constantly wavered between allegiance to the Tang court and to Nanzhao, and would sometimes adopt an ambiguous stance, when the Nanzhao army was not invading, they would swear loyalty and obedience to the Tang court, when the Nanzhao army did invade, they would often provide the vanguard, only the Bilong tribe of the Man people remained loyal to the Tang court, and had been at war with the other Man tribes for generations, the court gave the Bilong tribe the surname of Li, and appointed their chief as a governor.