Ye Zhi (William Butler Yeats 1865 ~ 1939) is an Irish poet and playwright. 1923 Nobel Prize in Literature winner. He was born into a painter's family in Dublin and was a political aristocrat. Early works include aestheticism and romanticism. After the 1990s, due to the support of Irish national autonomy movement, the poetic style gradually became solid, clear and close to reality. Representative works include the poetic drama Catherine in Hulimak (1902) and Easter in 2006 (19 192 1). Since the mid-1920s, because he is close to people's life and is keen on the study of metaphysical poetry, his works combine realism, symbolism and philosophical thoughts, and express the contradictory unity of good and evil, life and death, beauty and ugliness, spirit and body with carefully rehearsed spoken language and rich symbolic techniques, which has high artistic value. His excellent poems include Bell Tower (1928), Spiral Stairs (1929) and Sailing to Byzantium.