What do you think is the basis for the swallow's counterattack into Princess Zhu Huan?

Swallow was born in a bumpy place. She is a busker. The reason why she can become the daughter of the emperor, "Princess Zhu Huan", is not only because she met the noble Wei Zi in her life, but also because she made a group of friends who can share life and death. Swallow meets Lagerstroemia speciosa in the street. Lagerstroemia speciosa is gentle and beautiful, and the swallows hit it off, so they worship heaven and earth and become sisters. Wei Zi told Swallow about her strange life experience. Swallow was mistaken for Gege by the emperor in the process of helping Wei Zi. Wei Zi was also taken to the bachelor's office by mistake. After investigation, Wei Zi is the jewel of the royal family.