During the Zhenguan period of the early Tang Dynasty, there was an undercurrent surging under the prosperity of Chang'an City. The protagonist is in the market. On the surface, he runs a tavern called "Wangyou Pavilion", but in fact, he uses modern knowledge (food, wine, and salt production) to walk a tightrope between aristocratic families and imperial power.
Intention: Su Changqing, a time traveler. In his previous life, he was a top business trader with a shady character and a profit-oriented approach, but he was extremely protective of his shortcomings. There is no system, it all depends on the brain.