What's the name of Zhang's donkey?

Zhang is an old folk fairy named "Zhang Guo". Because he is the oldest person, people call him "Zhang". There is a real Zhang Guo in history, and the old and new books in the Tang Dynasty are all rumors. When Wu Zetian lived in seclusion in Zhongtiao Mountain, everyone said that he had the secret of immortality. He claims to be several hundred years old. Wu Zetian sent messengers to summon him, but Zhang pretended not to go. In the twenty-first year of Emperor Xuanzong of the Tang Dynasty, Wei Ji, the secretariat of Hengzhou, played his anecdotes to the emperor. Xuanzong called him, and Zhang Guo pretended to be dead. It took him a long time to wake up, so the messenger was afraid to go forward. Xuanzong heard about it and sent Xu Jiao to invite him. Zhang Guo has to go to Beijing. It is said that Tang Xuanzong doubted his rumors. He once asked Xing Hepu, who was good at calculating the good and evil of dying young, to tell Zhang's fortune. I don't know Zhang Jiazi, but a teacher is good at ghosts. Xuanzong asked him to see Zhang Guo, but he asked, "Where is Zhang Guo?" I didn't see it across the street. According to historical records, Zhang Guo was just an old liar with a guilty conscience. Otherwise, why not play dead a few times to avoid being drafted? At best, it is an illusion. Therefore, the fairy tales about him are all fabricated by Taoism for the purpose of propaganda, relying on folk rumors and exaggeration. "Tai Ping Guang Ji" also records that Zhang claimed to be Emperor Yao. When Emperor Xuanzong of the Tang Dynasty asked the warlock "Ye Fashan" Zhang about his origin, Ye Fashan said, "If you dare not speak, you will die." Later, he said, "Zhang Guo is a white bat essence in the beginning of chaos." He fell to the ground dead. After Xuanzong intervened, Zhang Guo saved him.