This is the story of a snarky catgirl who has, in fact, transmigrated but keeps forgetting that she did, and who believes that you won't die unless you tempt fate, and a poisonous older sister who has nothing going for her except her beauty and brains.
You could also call this story: The Foolish Central Plains People
The above is the self-destructive blurb
"Important people? You mean Boss Lu, the little beauty Qu, Master Wang, and Ye Shenfan?" the catgirl said impatiently.
"You know all of them?" asked the little boy, playing in the mud and sniffing.
"Don't listen to her. The people she knows are Boss Lu from the tailor shop, the tofu seller's youngest daughter, Master Wang from the noodle shop, and Ye Shenfan, who sells rouge." The older sister smacked the catgirl on the head. "She's just a nobody. How would she get the chance to know so many important people?"
The above is the serious blurb (though it might be even more self-destructive)