Eighties Poison Doctor: The Real Heiress Falls for a Mad Villain

[Transmigrate into a book set in the 1980s + apocalyptic poison doctor + portable space + real and fake heiresses + face-off between two transmigrators + white-lotus System + crazed male lead + face-slapping comeback] A top poison doctor and pharmacist from the apocalypse wakes up inside a book as the real Fu heiress, switched at birth in the 1960s. The original was tormented for seventeen years by her awful rural relatives and secretly poisoned over the years by the fake heiress in the capital, eventually dying a miserable death. After awakening a portable space filled with spiritual fields and colorful miracle potions, she vows to rewrite her fate with the trump cards she brought from the apocalypse! But Fu Siyue, the fake heiress who stole her place, turns out to be a transmigrator favored by destiny, with a built-in [Perfect Life System]. Armed with knowledge of the plot, a medical-skills buff, and a wealth of good fortune, she wins affection from every circle and repeatedly plots to harm the original. In the original novel, the iron-blooded regiment commander Pei Yanchen is an obsessive, crazed villain who spends his life in unrequited love with the System's heroine, meeting a tragic end. After seeing how deep his devotion runs, Lu Xiuxiu makes the first move. She openly flirts with him and aggressively pursues him, wrenching him away from the plot ordained by fate. She tears into her awful rural relatives, exposes the baby-switching scandal in public, and crushes her opponent, backed by the System, with poisoncraft and ancient medicine. Two transmigrators battle from afar, as fate's favor collides with the hard-won strength of the apocalypse. The System's alarms blare again and again, and the established plot comes crashing down. When the cold, crazed man has eyes only for her, the once-favored heroine is driven back at every turn. In this battle against destiny, will the System's lucky star have the last laugh, or will the poison-doctor heroine and her obsessive, powerful man break free of fate's control?