Transmigrated Into an 1980S Book, the Fake Heiress Won't Serve Anyone Anymore

[Feel-Good Power Fantasy + Period Setting + Transmigrate into a Book + Strong Female Lead] Ye Mianmian, a modern algorithm prodigy, transmigrates into a book set in 1985 and becomes the fake factory director's heiress in a period novel. She's the original heroine's cannon-fodder benefactor. As soon as she arrives, she's told to take the college entrance exam in the heroine's place. The reason? She got to spend 18 years as the factory director's heiress instead of the heroine, so she owes her. If being the factory director's heiress means cooking for the whole family, looking after two younger brothers, and being last in line for meat, then whoever wants the job can have it. Ye Mianmian has never been one to let herself get taken advantage of. Take the exam for someone else? Be a nanny? Not a chance. And the childhood sweetheart who was stolen from her can get lost. There are opportunities everywhere in this exciting new era, and she's busy building her career. And now some tycoon from Hong Kong has shown up too...