怛罗斯战役
According to his writings, he was one of a few Chinese captured in the Battle of Talas in 751, along with artisans Fan Shu and Liu Ci and fabric weavers Le Wei and Lu Li. After a long journey through the Abbasid Caliphate (the 'Lands of the Tājīk', 大食), he returned by ship to Guangzhou in 762.