The 1970s Machinery Plant: The Beloved Little Sister Has a Head for Numbers

"Settle the entire factory's accounts in ten minutes, and if you're off by even one cent, someone goes to prison?"

Top modern auditor Lin Wanxing dies of overwork and wakes up in 1970 as the frail little sister of the Hongxing Machinery Factory, a sickly girl everyone insists won't live past sixteen.

Her family treasures her like a precious gem, but from the start, they're faced with a complete mess: her mother has been framed for embezzlement and faces suspension, her eldest brother's future has been blocked, and her third sister is timid and constantly bullied.

Lin Wanxing pulls out a hardwood abacus and sneers. "Audit the books? I can do mental arithmetic with my eyes closed, and still be faster than you!"

Her fingers fly over the abacus, and in six minutes she catches the cafeteria's biggest thief, making a name for herself throughout the factory!

With an exam question bank in her head, she predicts the test questions and helps her eldest brother take the top spot in the college entrance exam.

Everyone in the compound is completely dumbfounded. "Wasn't she supposed to be a sickly girl? How did she make the whole family rich?"

Even Gu Zheng, the famously stern and incorruptible man, keeps coming to call. "Comrade Lin, could you calculate how likely it is that we're destined to be together?"