From
崔颢《黄鹤楼》 (Cui Hao, Tang, early 8th c., on the Yellow Crane Tower in Wuchang):
昔人已乘黄鹤去,此地空余黄鹤楼。黄鹤一去不复返,白云千载空悠悠 (The ancient has already ridden the yellow crane away; in this place only the Yellow Crane Tower is left. The yellow crane once gone will not return; white clouds for a thousand years drift emptily on). Famously called by Ming critic Yan Yu 'the greatest seven-character poem of the Tang.' Li Bai is said to have visited the tower, read Cui's poem, and refused to write his own, legend records him saying
眼前有景道不得,崔颢题诗在上头 (A sight before my eyes I cannot describe, Cui Hao's poem is up above).