My Poison Lover.

A forward-thinking girl from the present day collides with the indifferent prince from ancient times when she wakes up in the body of a woman who used to be bullied by everyone. A girl who works as an extra in costume dramas accidentally time travels to Mingxi Kingdom to become the eldest daughter of Pan Tai Fu. The original owner of her body had to endure endless bullying from her younger sister Pan Miao Luo. Now that she's been gifted with the 'genius pill', the new "Pan Miao Shuang" takes a complete one-eighty to get back at everyone from her evil father to her toxic stepmother, all while finding love with prince Jun Zhi Chen.