The Yellow Emperor and the Saint Teacher: Long long long time ago in ancient China, there was the Yellow Emperor. He invented the compass, and help develop farming in ancient ancient ancient central plain of China near the Yellow River. One day he decide to give up his throne. He heard of a nomad saint living up in the mountains and seek to learn from him.
Saint Teacher: Why have you come here?
Yellow Emperor: To learn how to make the world an even better place
Saint Teacher: Go away. What you seek will only eventually destroy even the sun.
The Yellow Emperor went away confused. Later he came back to the Saint teacher again.
Saint Teacher: Why have you come again?
Yellow Emperor: To learn how to cultivate myself.
Saint Teacher: This, I can teach you.
And so the first book of Chinese Medicine, the dialogue between Yellow Emperor and Saint Teacher named “The Inner Classic of Yellow Emperor” (Huangdi Neijin 黃帝內經）was born.
Incidentally, some confuse 黃帝 Yellow Emperor with 皇帝 a general emperor title. Both are pronounced huangdi but one is a specific person. The other is a general title and so not the same.