Lü Dongbin (circa 796 AD-1016 AD), is a legendary Chinese scholar and poet said to have lived during the Tang Dynasty. Whether he actually lived the two hundred and twenty years cannot be determined.
Elevated to the status of an immortal in the Chinese cultural sphere by Daoists, he is one of the most widely known of the group of deities known as the Eight Immortals. Lü is also a historical figure and mentioned in the official history book History of Song. He is widely considered to be one of the earliest masters of neidan, or internal alchemy. He is also depicted in art dressed as a scholar carrying a sword to dispel evil spirits.