Yu Wensuo 'an (1946-), born in St. Louis, Missouri, USA, is a famous American sinologist. He was interested in poetry since he was a child. In the Baltimore Library, Yu Wensuo 'an first came into contact with China's poetry and fell in love with it soon, which is still the case today. 1972, Yu Wensuo 'an received his Ph.D. in East Asian Department of Yale University, and later taught at Yale University. His works have been translated and introduced to China: Poems in the Early Tang Dynasty, Poems in the Prosperous Tang Dynasty, The End of China's Middle Ages, Essays on Literature and Culture in the Middle Tang Dynasty, Poems in the Late Tang Dynasty 827-860, Memories in China's Classical Literature, The Labyrinth of Lost Poetry and Desire, Recent China Literary Theory and Other Mountains.