After I Died of Cancer, He Went Mad Clutching My Ashes

In Her Past Life, She Loved the Wrong Man and Died Miserably in the Cold Palace. Reborn, She Tears Apart Her Gentle Façade

I'm looking for stories similar to Reborn in the Qing Palace: I Abandon the Emperor and Take Power over the Six Palaces. In her previous life, she gave her heart to the wrong man and died miserably in the Cold Palace. Reborn, she tears off her gentle disguise. The emperor is heartless, so she'll abandon love in the imperial palace, change the course of events through her own power, and take control of the Six Palaces.