Zhang Guolao is a legendary figure in Chinese folklore, often depicted as one of the Eight Immortals, a group of mythological beings in Taoism. He is typically portrayed as an elderly man with a long white beard, riding a donkey backward. Zhang Guolao is known for his wisdom and magical abilities, particularly his skill in alchemy and healing. In Chinese culture, Zhang Guolao symbolizes longevity and the pursuit of immortality. He is often associated with the concept of Daoism, which emphasizes harmony with nature and the quest for spiritual enlightenment. His stories and teachings continue to inspire many in the realms of spirituality and traditional Chinese medicine.