杜佑
Thereafter, Li left Xu Prefecture and returned to Yang Prefecture. Du Jian, angry at how he felt Li took away his chance to control Xusihao, submitted an accusation to Emperor Dezong accusing Li Fan of having encouraged the rebellion of the Xu Prefecture troops. Emperor Dezong, in anger, issued an edict to Du You ordering him to execute Li. Du You, however, did not have the heart to do so. He showed the edict to Li, who indicated that he did not fear death. Du You, however, submitted a petition defending Li. Emperor Dezong, still not believing Li's faithfulness, summoned him to the capital Chang'an to meet him personally. After meeting Li, due to Li's relaxed attitude and elegance, concluded that Li was not guilty of treason, made him "Mishu Lang" (秘書郎), an official at the Palace Library.