Well, it is said that there were three people with superb medical skills during the Yellow Emperor period, namely Qi Baishi, Lei Gong and Yu Zhi, among whom Yu Zhi had the highest medical skills. Huangdi and Qi Bo Lei Gong wrote Huangdi Neijing, but they thought it was not perfect enough, so they asked them to write a Huangdi Neijing together. However, Yu died before he finished writing, and his son finally wrote the book for him. Unfortunately, there was a fire at home, and both the Yu family and Huangdi Waijing were buried in the sea of fire and disappeared. However, this is only a legend, and the origin and author of Huangdi Neijing is still a mystery.