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"One pear tree and one begonia" originated from Su Dongpo's teasing of Zhang Xian (990- 1078) in Song Dynasty. It is said that Zhang Xian married a concubine of 18 years old at the age of 80. Dongpo joked: "The eighteen brides are eighty lang, with white hair and red makeup. Two nights in the quilt, a pear tree pressed Haitang. " Pear flower refers to a white-haired husband, Haitang refers to a beautiful young woman, and there are countless unspoken words on a "pressure" road! Interestingly, Zhang Xian lived to be 88 years old, and only lived for 8 years after marrying a concubine of 18 years old. Surprisingly, Yu Ji gave birth to two men and two women for him in eight years. Mr. Zhang has ten sons and two daughters all his life. There is a gap of sixty years between the eldest son and the youngest daughter. When Zhang Xian died, my concubine cried her eyes out. A few years later, she died of depression. Liu Tingji of Qing Dynasty wrote in Garden Magazine that one spring, he visited his subordinates in Huaibei and "passed by Suqian's family". He couldn't help laughing when he saw that "the thatched cottage has terraced fields, uneven flowers and trees, and the path is quite secluded", especially "the pear blossoms in the small garden are the most prosperous, changing like snow, and there are begonia under it." Help the dove laugh into a mandarin duck, and a pear tree presses the begonia. " This is the same as Su Shi's meaning. It turns out that "a pear tree hits a begonia" is a euphemism for the elderly with few wives, that is, "the old cow eats the young grass"