After I Became a Poisoner, Bigan Had to Give Me a Thumbs up When He Came.

She is a concubine who was rejected by her family, and he is a cold-faced war god who is poisoned by a strange poison. A broken sedan chair sent her into the palace of Prince Jing, which was like a gate of hell. It was originally a contractual marriage where each got what he wanted, but she used her medical skills to bring him back from hell. When the ugly concubine lifts her mask and reveals her amazing talent, the frozen heart of the God of War also falls.