The Real Heiress Can't Be Bothered With You

Everyone mocks Lu family's second daughter, Hua, for being useless and only caring about eating, drinking, and having fun. She isn't as sensible or clever as her big sister, and she doesn't study as well. So why does Grandma love her more than life itself? Isn't it because she's the legitimate daughter born to the first wife? Her stepmother warned her: “An idiot like you shouldn't think you're the real heiress just because you were born to the first wife. My daughter is a genius. If you know what's good for you, keep your head down and stop bringing shame on the Lu family!” Her sister said: “You're not as pretty as me, and you're not as smart. Your mother died young, too! You're just like her, with a life as fragile as paper! What makes you think you can inherit the Lu family?” A genius doctor is reborn in the body of the neglected second daughter of the Lu family. Fortunately, she has a grandmother who loves her more than life itself. Just as everyone gets ready to laugh at the family's real heiress... All the big shots come rushing over to pay their respects. “Boss, if you weren't dead, you should've told us sooner!” (Alternate universe + light sci-fi)