During the Dajing Dynasty, the imperial power of the court and the power of the vassal kings were balanced, and secret fights occurred frequently. Prince Jing Xiao Jinyan made great achievements in battle but was jealous of the emperor. In order to stabilize the situation in the court, the emperor granted a marriage and appointed the legitimate daughter of the Su family, the minister of civil affairs, to marry into Prince Jing's palace. The Wen family did not want their biological daughter to marry into the dangerous and strict royal palace, and she was reluctant to part with her noble status as a prince and princess, so she planned a substitute marriage and pushed out the frail and seemingly cowardly legitimate daughter Su Wanyu, leaving her concubine Su Lingwei to stay at home and wait for an opportunity to marry another high-ranking family member.
