Who is the white beard of the Eight Immortals?

Zhang, a famous fruit, was a Taoist priest in the Tang Dynasty, that is, an old man with a white beard riding a donkey backwards in Taoism. He once lived in seclusion in Zhongtiaoshan and became a monk. He didn't know how old he was when he claimed that he was born in Yao. Zhang often rides a white donkey and visits Wan Li every day.

The so-called "Eight Immortals" are Li Tie Kidnapper, Zhong Liqian, Lan Caihe, Zhang, He Xiangu, Han Xiangzi and Cao Guojiu.