At the night banquet in the palace, Zhen Huan quietly left the banquet with emotion, but unexpectedly met King Guojun at Tonghua Terrace. Yunli told Qidao about the life of his mother, Concubine Shu, and expressed his sorrow, lamenting the cruelty of the world; Zhen Huan returned to the banquet, and the maid reported that Cao Guiren's daughter, Princess Wen Yi, was spitting milk. The emperor and the others were quite surprised. Concubine Hua realized that the emperor loved Princess Wen Yi very much, so she made a plan and ordered Cao Guiren to bring Wen Yi to her to raise her. On the one hand, she wanted to win favor and show her virtue; on the other hand, it was convenient for her to further control and suppress Cao Guiren. .

Seeing her daughter suffering, Cao Qin was silent and hated Concubine Hua secretly. Wen Yi's condition worsened, and the emperor was worried, so he stayed in the Concubine Hua's palace day and night. The imperial physician suspects that Wen Yi's food is hurting his stomach, and finds out that the horseshoe soup eaten by the child has been replaced with cassava flour, and Zhen Huan is then suspected of being poisoned. The emperor asked Zhen Huan if she had been away from the banquet for a long time that night, if anyone could testify for her; at a critical juncture, Concubine Duan, who had been ill for a long time, came forward to testify for Zhen Huan, turning the danger into safety. Although the emperor had doubts, he let the empress take full power to deal with it in order to appease the public opinion. After this incident, Cao Guixin felt sorry for her daughter being used by Concubine Hua, and felt betrayal in her heart.