Li Shangyin
Duan Chengshi () (died 863) was a Chinese poet and writer of the Tang Dynasty. He was born to a wealthy family in present-day Zibo, Shandong. A descendant of the early Tang official Duan Zhixuan (, "Duàn Zhìxuán") (-642), and the son of Duan Wenchang (, "Duàn Wénchāng"), a high official under Tang Xuanzong, his family background enabled him to obtain office without taking the Imperial exams. As a poet, he was associated with Li Shangyin and Wen Tingyun.