Su Shi's eighteen brides is eighty lang, with white hair and red makeup. What's the name of this poem? Two nights of mandarin duck quilt, pear tree pressing begonia.

This is a limerick, and its name is "A Play for Zhang Xian".

This poem comes from a literary joke between Zhang Xian (990- 1078, Ye Zi) and Su Dongpo in the Song Dynasty. The reason is that Zhang Xian married a woman of 18 years old as a concubine at the age of 80. I wrote a poem for this: "I am eighty-eight, Qing is a beauty, and my hair is white." It's the same as Qing's upside down, except that there is a flower in the middle. As a good friend, Su Shi made a poem to tease him after knowing that he was engaged in it: "Eighteen brides and eighty lang, with white hair and red makeup. Two nights in the quilt, a pear tree crushed Haitang. " "A pear flower hits a begonia" is a euphemism for the elderly with few wives, that is, "the old cow eats the young grass". Pear is white and begonia is red.