Many people can recite "Year after year the flowers look alike; year after year the people are not the same" from this poem.
Tips
history
A Tang anecdote says that 刘希夷's uncle 宋之问 begged him for the famous couplet and, when he refused, had him smothered with sacks of earth. It is probably legend, but it shows how prized the lines were.
usage
白头翁 here is a white-haired old man. The same word also names a bird, the Chinese bulbul, and a plant, the pasqueflower.