Emperor and Queen

Confused, Yan Tang wakes up in her bed on the day of her wedding to Qin Jing An. She soon realizes that she has somehow been reborn after being poisoned by her husband and her cousin, Zhao Ying Ying. In her previous life, her husband wanted to gain merits by carrying out the Emperor’s edict, saying that the whole Yan family was to be beheaded. This time around, she refuses to marry him and sends him away.

(Source: PeeWee69 at MyDramaList)