After rebirth, she killed her best friend and took over the scumbag's kingdom

Xia Fanxing, the daughter of the general's mansion, was loved by everyone. However, all the men of the Xia family died on the battlefield, and she became the only blood of the Xia family. Fortunately, she had a ghost doctor as her teacher, who taught her medicine, poison, military tactics and Qimen Dunjia. Yun Jingxi, a scumbag, did whatever it took to marry Xia Fanxing. However, his true love was Xia Fanxing's best friend. For the sake of his beloved, he assassinated Xia Fanxing himself and kicked her into the abyss. Xia Fanxing fought back before his death, and a sword turned him into a eunuch, and he had no chance to meet true love from then on. Three years later, Xia Fanxing was reborn as Feng Qiongzhu, the daughter of the Feng family. She vowed to avenge Yun Jingxi and the couple and take back her kingdom. However...