据汉朝《韩诗外传》记载,春秋时,魏国有个叫子质的大臣,他得势时曾保荐过很多的人。后丢官只身跑到北京,见到一个叫简子的人,向他发牢骚,埋怨自己过去培养的人在危难时不肯帮助他。简子听后笑着对子质说:春天种了桃树和李树,到夏天可在树下纳凉休息, According to the Han Dynasty’s “Hanshi Poem,” it was recorded that during the Spring and Autumn Period, the Wei state-owned minister was called a subordinate minister and he had sponsored many people when he got the chance. After losing his life, he ran to Beijing alone and met a man named Jian Zi. He complained to him and complained that the people he had cultivated in the past refused to help him in distress. After Jane listened to the child, he smiled and said: Spring planted peach trees and plum trees.