The Yellow Emperor, known as Huangdi, is a legendary figure in Chinese history and mythology, often regarded as a cultural hero and a founding ancestor of the Chinese people. He is believed to have reigned around 2700 BCE and is credited with numerous contributions to Chinese civilization, including advancements in medicine, agriculture, and governance. The Yellow Emperor is also associated with the development of Chinese medicine and the I Ching, a classic text on divination. His reign is often seen as a golden age, symbolizing the beginning of Chinese civilization and the unification of various tribes under a central authority.