唐代崇尚道家,因而也崇尚仙人。相传当时有个叫刘简的人,平生爱慕仙道,听说哪里有名山仙迹,定要去游览拜访。开元初年,刘简遇到一位自称虚无子的采药老人,虚无子被刘简锲而不舍的寻仙精神所感动,便把他带到自己的药园参观。那药园,真是姹紫嫣红,香气袭人,宛如仙境。虚无子对他说:“长生不死是不可能的,但长寿是可望而得的。”随后指着水池边一种长得墨绿 Tang Dynasty advocate Taoism, which also advocates fairy. According to legend, there was a man named Liu Jane, immortal admiration, I heard where the famous mountain fairy tracks, will visit. In the first year of Kaiyuan, Liu Jian met an elder who claimed to be an imaginary child, and was impressed by Liu Xian’s perseverance in searching for immortality. He took him to visit his own garden. That medicine garden, really colorful, aroma hitting people, like a fairyland. The imaginary child said to him: “Life and death are impossible, but longevity is expected.” "Then pointed at the edge of a dark green pool