Han Yuan, after transmigrating to the Tang Dynasty, inherits his family business. A strange man always comes to his restaurant, asking strange questions. Emperor Taizong repeatedly asks Han Yuan for his opinions on the emperor himself, his sons, and even Princess Chang Le. Annoyed, Han Yuan retorts, "How else would I look at her, but lying down!" One day, Emperor Taizong reveals a shocking truth: "I am the current emperor, and also your father-in-law." This is a historical fiction novel, so please don't delve too deep into historical accuracy!