Yan Chaqing has an impeccable tongue and a good skin with outstanding character. What he is best at is refining the secret medicine of obscene elixirs for the emperor. He is known as the number one demon in the Daxuan Dynasty.
In fact, being a demon is not that easy. He is used by the emperor, plotted by the prince, hated by the queen mother, and has a lot of women in the harem eyeing the "super aphrodisiac" in his hand... Oh my, if I had known better, I might as well have brought my apprentice home to sell sweet potatoes.