张果老是民间传说故事“八仙”中的一位。善于养生，有文献称其“有长年秘术”。张果老经常倒乘一头毛驴，日行数万里，这也透露出古人对于超越式交通工具的向往。

Zhang Guolao is one of the immortals in the “Eight Immortals” legend. He is adept at preserving health. Documents have recorded that he possesses the “secret of immortality”. It is a common scene that Zhang Guolao ridesa donkey backward to travel a long distance. This also reveals the yearning of the ancients for advanced vehicles.