After Yu Wanwan entered the palace, he followed the hexagram "you can win if you lie flat" and started his salty fish career. Faced with the harsh treatment of Concubine Shu and the emperor, she relied on her knowledge of toxicology to set up a counterattack, revealing the truth that Concubine Shu and the queen colluded to frame her sister Yu Youwei, and cleared the grievances of her family. Throughout the whole process, he had no love for power and no desire for a subordinate position. After stirring up the turmoil in the harem and defeating all enemies, he resolutely refused the emperor's offer to stay and left the palace to return to his salty life.
