Zhang Yanyuan (from 815 to 907), whose name was Aibin, was from the Yi family in Puzhou (now Linyi County, Shanxi). Minister of the Tang Dynasty, painter, painting theorist, great-grandson of Zhongshu Ling Zhang Jiazhen, son of Zhang Wengui, servant of the palace. Born in three generations, he is erudite and eloquent. Good at calligraphy and calligraphy, good at appreciating, at first he was Zuo Buque. In the early years of Dazhong (847), he moved to the ancestral ministry member Wailang. Xiantong three years (862), served as the governor of Shuzhou. In the early years of Qianfu (874), he served as Daliqing.