Zhang Daoling (156 or 178) is a Chinese character. Founder of orthodox Taoism in the Eastern Han Dynasty (that is, Taoism in Shi Tian). Inheriting Huang Lao and enlightening Taoism. Taoism called him "the ancestor Shi Tian", that is, the ancestor of Zhang Tianshi, and the founder of one of the three great ancestors of Taoism (although the name Shi Tian was not used by him first); Also known as "real people" and "three-day exorcism", it is equal to wisdom and god. People often call it Zhang Tianshi.