The White Moonlight is a Fake Daughter [70s Era]

Su Yuan is an eighteen-year-old girl raised in a military compound family, believed to be the biological daughter of Zhang Lanjun and Su Jianguo. Her world is upended when news spreads that she is not the family's true child, but rather a girl swapped at birth with Zhao Xiaoxue, who has now returned from the countryside. The revelation transforms Su Yuan from the favored daughter into an outsider, as her family eagerly welcomes Zhao Xiaoxue while gradually distancing themselves from Su Yuan. Throughout her childhood, Su Yuan bore the burden of household chores and the emotional weight of being told she was the premature baby who nearly killed her mother in childbirth. This guilt had shaped her compliant and self-sacrificing nature, but the discovery that she is not biologically related to the Sus liberates her from that false sense of obligation. The core conflict arises from the sudden shift in family dynamics. Zhao Xiaoxue, who possesses memories of a past life where she was the novel's heroine and Su Yuan the villain, seeks to replicate that narrative. She manipulates situations to win the affection of Su Yuan's family, particularly her mother Zhang Lanjun, while subtly undermining Su Yuan. Zhao Xiaoxue claims the room of the third son, disrupts family meals, and attempts to sabotage Su Yuan's reputation by spreading rumors that she is engaged to Xiao Qi, a local man who has long harbored an obsessive crush on her. Su Yuan, however, refuses to play the role of the virtuous sister or the victim. She confronts Xiao Qi directly, rejecting his advances and exposing his manipulative behavior, which causes tension but also clarifies her independence. A significant turning point occurs when Su Yuan dreams of a novel in which she is the vicious supporting character destined for a tragic end, while Zhao Xiaoxue is the beloved heroine. Upon waking, Su Yuan realizes that reality is beginning to mirror this fictional plot. Determined to break free from this predetermined fate, she decides to leave the Su family and investigate her true origins. She discovers that her aunt, Su Yanning, lives in the Northeast and was involved in the switch, but her father Su Jianguo has been hiding the truth and preventing any real investigation. Su Yuan secretly obtains her aunt's address with the help of her friend Wen Yan and registers as an educated youth to be sent down to the countryside in Longjiang Province. As Su Yuan prepares to depart, the family's true colors are further revealed. Zhang Lanjun shows little genuine concern for Su Yuan's departure, prioritizing Zhao Xiaoxue's comfort instead. Su Yuan sells her electric fan to raise funds for her journey and maintains a stoic demeanor despite the emotional turmoil around her. She successfully deceives her father by claiming she is going to care for her godmother, Ye Jie, whom Su Jianguo had previously abandoned. With the support of her loyal friends Li Chaoyang and Sun Xiaohu, and the secret assistance of Wen Yan, Su Yuan boards a train to the Northeast. Her departure marks her escape from a family that values blood ties over genuine love and her rejection of the submissive role imposed upon her. The story follows her determination to uncover the truth about her birth and forge a new life on her own terms, far removed from the manipulative schemes of Zhao Xiaoxue and the hypocritical expectations of the Su family.