Yellow Emperor
It is said that he had learned medicine from some celestial being like Guangchengzi, Chisongzi (), or Zhongnanzi (). He recognized medicinal herbs in daylight, learned the Tao of health maintenance and mastered jingluo medicine. Zhongnanzi recommended Qibo to the Yellow Emperor, while the Yellow Emperor asked Tao to Guangchengzi in the Kongtong Mountains. Qibo became the chancellor of the Yellow Emperor. He sampled medicinal herbs by the order of the Yellow Emperor. "Huangdi Neijing" is a book comprising the dialogues regarding medicinal problems between Yellow Emperor and Qibo.