The Gentle Daughter in the Past Life, the Vicious Daughter in This Life

In his previous life, he was gentle and obedient, abiding by ethics and teachings, but he was plotted and poisoned, and in the end he lost everything. This life: After rebirth, he has a heart as hard as iron, is cold and selfish, has an online IQ, is good at calculations, and has ruthless means. The goal is clear: live for herself, take revenge on all those who wronged her, take back everything that belongs to her, and enjoy the ultimate glory and power!