Fuyao: Reborn Sisters

Fuer and Yaoer are twin sisters adopted by the Cheng and Lin families respectively. Fuer becomes the favored daughter of an official household, marries the Crown Prince, and lives a glorious life, while her sister Yaoer suffers in poverty in the countryside. Jealous of her sister's fortune, Yaoer poisons Fuer, leading to their mutual deaths. Reborn to the year they were abandoned, Yaoer seizes Fuer's adoption opportunity to escape poverty, forcing Fuer to be taken by Lin Zhengqing. Fuer changes her name to Lin Fuer and joins the Lin family, flipping their fates.