Li Yuanzhen, a bartender at a wine shop in Chang'an West City, accidentally ate Hu Shang's fermented dough and developed a photographic memory. All kinds of market conditions are automatically archived in the mind, like hiding a living "Chang'an Miscellaneous Records". I wanted to save money to marry the widow next door, Ah Pei, but I couldn't hide my wisdom. From writing letters to clearing the prince's grievances, from mediating disputes to quarreling with Confucian scholars, he has repeatedly solved strange cases with his clever mouth, a copy of "Three Hundred Articles of the Law" and a donkey who understands human nature. The court is amazed and the world is a god, but he just wants to open a small shop and live his own life. The temple is high and far away, but it is not as fragrant as cooking cakes; when all the nations come to court, how can they resist the sound of "the lady is here".