漢朝淮南王劉安，
晚年學道想成仙。
傳說他想得長生不老術，
有一天來八個老翁要求見，
都自稱已經練成“不老術”，
想給他當麵把術獻。
劉安想他們都老成了那個樣，
無非是想把我的錢財騙。
叫門人快把他們都趕走，
氣呼呼地不接見。
八老翁不以為意笑了笑，
對門人說：“若不信，
待我們變給你看一看。”
眨眼間，八老翁變成了八兒童，
門人一見傻了眼。
忙進去，請出劉安觀看時，
八人早已影不見。
老翁能夠變兒童，
無稽之談屬荒誕；
人們把“返老還童”作成語，
常形容老年人恢複青春容光煥。
Change from an Old Man Into a Child
In the Dynasty of Han（206B。C。—220A。D。）the Lord of Huainan was Liu An。When he was old，he wanted to be an immortal。The legend goes that he wanted the gift of immortality。
One day eight old men came to see him，and they said that they had the“Art of Rejuvenation”and would like to give a demonstration of it to him。Liu An thought that as they all were so old they would try to cheat him out of his money。He then asked his men to drive the old men away，and angrily slammed the door behind them。
The eight old men laughed indifferently，and said to the janitor，“If you don't believe us，we'll show you。”In a wink of time，eight old men turned into eight children，which quite astonished the janitor。The janitor then went back quickly to tell Liu An，but the eight men had already gone from sight。
The old men changing into children，was actually a conjurer's trick，but“Change from an Old Man Into a Child”was later adopted as an idiom that means to recover one's youthful vigor。